Astrology Transits December 2025: How to use Mercury in Scorpio & Sagittarius in the 12 Zodiac Rising Signs

Marcus Romano
Dec 2, 2025
18 min read

Updated: Jan 4

This month, Mercury stationed to move direct in Scorpio and moves slowly into Sagittarius – communications will shift from serious and strategic to philosophic and engaging. Find out how you can use the planet of communication best in two of his more challenging signs.

I recommend you read my short introduction that illustrates what we focus on when tracking Mercury; however, you can also skip to your rising sign here:

What's important about Mercury and why do we track it?

Mercury is the fastest moving planet, which is one reason that it has rulership over manual dexterity, communications, the rational mind (think of the part of the mind that takes in outside input and processes information), computers, small electronic devices, bike messengers, small cars, couriers, and more. All of these things share at least one trait: they are, or relate to, fast-paced activities. Mercury is also excellent at gathering information and processing it quickly. He conveys messages and communications as well, and we notice issues with these functions – as well as all the electronic devices he rules – when he is retrograde.

In general, Mercury struggles in both water signs (slow, pensive, emotional) and fire (too fast, self-concerned, action oriented, broad-minded). This means that Mercury tends not to act naturally in Cancer, Scorpio, and Pisces (a sign where the ancients placed him in fall and debility, meaning he acts both unnaturally and weakly), and in Aries, Leo, and Sagittarius (a sign where he is in debility, meaning he acts unnaturally, or is not at home). As with everything in Astrology (and probably in the Universe), there are exceptions to this rule, and the whole chart must be studied to make an astute decision about how Mercury is acting for each individual no matter his sign placement. And Mercury has special skills in every sign, something I will discuss in a different blog post.

On December 1st, Mercury stationed to move direct in Scorpio and move slowly (for him) into Sagittarius...

Mercury is not comfortable in either of these signs, being too focused in Scorpio (one negative is obsessing mentally) and too unfocused in Sagittarius (one negative is losing the trees for the forest). Stationing Mercury can be used to focus more intensely as his normally rapid energy is directed with single-pointed focus. Now, in Scorpio, this can mean hyperattention to the “job” at hand, and can be quite useful. Therefore, research is usually better completed with Mercury in this sign, especially stationing direct. However, it can also mean a tendency to obsess over instances that bother the individual. Paranoia, jealousy, and negative thoughts pattens can cycle and recycle with more intensity. The desire to be verbally harsh with others can be higher.

Sagittarius, ruled by Mercury’s opposite planet, Jupiter, is fast-paced too (being mutable fire, it may be the fastest paced sign!), but the two do not dance the same dance. Sagittarius governs large scale connectivity and communication. Think of the satellite flying in orbit or the internet - lots of information being distributed to lots of people of a huge amount of space (though some give rulership of that to Aquarius). Sagittarius also governs the philosophic mind, which takes lots of information and synthesizes it into ideas that color how a person interfaces with the world (what is your life philosophy?). Sagittarians are usually good at coordinating large scale activities, projects, and lots of people so that an organization or group can achieve a broader goal in an effective way. Mercury is more into the efficiency side of the scenario.

How to use Mercury's energy this month in the 12 rising signs. Astrology Transits December 2025:

Aries Rising

Mercury is in your 8th house in Scorpio until December 11. This is excellent for research into any topic, but you might want to focus on Scorpio subjects like finances, medical topics, pharmacology, epidemiology, and self-transformative work. You can write about the research results as well. You can direct mental energy to reviewing any saved or inherited money that you manage. This is nice for meditation, breathing practices and study of transformative works. If you manage the critical resources of others (money, bodies, possessions), you can put very concentrated energy into determining ways to help those clients or people. Employees or coworkers can be stubborn under this one, but they can be more focused as well. Healthwise, the digestion can be sensitive. Little bugs can come into the colon, so eat with care. The genitalia are prone to minor infections or bugs as well, so practice safe sex!

Mercury is in your 9th house in Sagittarius from December 12 to the end of the month. You may want to look into publishing writings under this one. You can write up or design advertising or marketing campaigns. It can make you want to do mental exploration, but you might travel physically as well. Travel for work is possible. This is wonderful for using your communication abilities as a teacher or a student – be more active in classes if you are teaching or taking any.

Taurus Rising

Mercury is in your 7^th house in Scorpio until December 11. Communications with partners about intimate subjects can be nice, but if you are feeling jealous or angry, take deep breaths and take you time. Plan the discussion, do not be hasty. And remember to step back if you are feeling controlling. Communications with clients, if any, may come through as intense; maybe counter by being lighthearted at times, but weigh the situation. If they need serious, give them that. Advice from service providers can be very perspicacious; incisive and getting to the heart of a problem. But be sure Mercury makes good angles to planets that represent the advice and you in your natal chart. Otherwise, this advice can carry force and be generally good, but not great for you individually. If you meet someone new under this aspect, they will have very fixed emotions and thoughts and can tend to have control issues. On the other side, they will be devoted, loyal and caring on a deep level (can be hard to see on the surface).

Mercury is in your 8^th house in Sagittarius from Dec. 12 to the end of the month. If you are getting medical advice, double check it during this one. If you advise clients about money, their health, or other critical resources, be sure your do not lose the important details while giving bigger picture advice. If you invest, make sure not to make any impulsive or not fully researched decisions. This is nice for transformative work involving study, writing, breathing, and meditation. Let the mind become focused while also seeing the whole. Take care of the central nervous system, as it can be agitated at this time. Little kinks in the hips, pelvis, and thighs can arise. The sciatic nerve is more sensitive.

Gemini Rising

Mercury is in your 6^th house in Scorpio from December 1 to 11. The mind can focus quite well on daily tasks and make strong routines and habits. These can be physical or mental, so if you want to add some mental work, writing, or breathwork to you daily life, this is nice time to do it. Do not be too OCD about cleaning, organizing, and order generally. Communications with property managers or workers should be done with care. Use some transformative techniques to improve your diet or exercise routine – try qi gong or tai chi. The colon is prone to nervous issues and spasm.

Mercury is in your 7^th house in Sagittarius from Dec. 12 to the end of the month. Communications with partners should be undertaken with care. Same for work communications. You may want more time with close friends or partners as your ruler, Mercury, goes to their house. You can try to find practitioners aligned with your value system under this one. Be careful signing contract under this one. It can be nice for hiking or adventuring with a close friend or partner. Sometimes the advice you get from practitioners needs a second look.

Cancer Rising

Mercury is in your 5^th house in Scorpio from December 1 to 11. Here, you can work on using your self expression – writing or sketching are good options – to release some deep emotions, or just for fun. Little vacation journeys can be nice – somewhere more serious or where you can engage in transformative practices. Talking about intense or serious subjects for enjoyment can be nice. Maybe good for emotional processing. This is nice for sports and athletics that involve use of the hands. You may seek romance, and the trine to transit Jupiter can mean you get lucky. Mercury rules your 3^rd house, so this really is a nice time to develop writing skills, or other technical or artisan craft and art skills. Mercury rules your 12^th house, so you can engage in some transformative meditative or breath work or study that you find enjoyable.

Mercury is in your 6^th house in Sagittarius from Dec. 12 to the end of the month. Here, we are concerned with nervous system balancing. Look into nervines to sooth your central nervous system. Sciatic is a bit touchy. Care for the hips, thighs, and pelvis is required because the nerves here are more sensitive. This is good for studying information from other cultures about diet and exercise. You can implement it too with a nice-organized structure. This is good for writing up your daily routines as you want them to be. Lots of exercise – cardio is good if you are able. Mercury rules your 3^rd house, so you can do lots of local exercise work. Mercury rules your 12^th house, so you can make spiritual practices more part of your daily routine. Take care of both mental and physical health.

Leo Rising

Mercury is in your 4^th house in Scorpio from December 1 to 11. This can be nice for intimate communications with family members. It can bring intense family communication as well though. Psychological work can be good under this one – consulting or self-completed. You can do self-transformative work at home more in this period, including breath work, study or meditation. Mercury rules the 2^nd house, If you run a home business, you can put energy into making money from this – use advertising, communications, and connectivity more. Mercury rules the 11^th house, so it can be nice to have home gatherings under this one. Mercury rules your 11^th house, which can be nice for having friends visit at home.

Mercury is in your 5^th house in Sagittarius from Dec. 12 to the end of the month. This can be a fun time to run, hike, and bike for fun – outside time, if possible, is great. Dancing is good too. You can write stories under this one or do some neat painting. Traveling for fun is good under this one. Mercury rules your 2^nd house, so you can try to make money from any art or writing you might do – you could try to publish things under this aspect. He rules your 11^th house, so you can have good times with funs. Going to art shows or music festivals can all be nice.

Virgo Rising

Mercury is in your 3^rd house in Scorpio from December 1 to 11. This is a nice time for writing on intense subjects, mysteries, occult, or even romance works. It is good for work-based communications and making work connections, especially ones that require strategy. You can spend time studying new languages. It is nice for developing skills that require focus and hand eye coordination. Counseling others on intense subjects and psychology can be helpful. Be sure not to become too obsessive in your thought patterns. Spending time with friends or siblings can be nice. Using you mind to plan management of yours or other’s critical resources (bodies, money, possessions) is helpful. You can read interesting books or stories – murder mysteries, romance, occult. This is also good for learning about herbs, transformative techniques, Chinese medicine, allopathic medicine, the law, and other Scorpio topics. Careful of accidents if you have natal Mars in late Scorpio or another fixed sign (Taurus, Leo, Aquarius) in the late degrees. Mercury rules your 1^st house, so you can develop new skills and talents to help with your role as a writer, communicator, one of service to others, a worker, a skilled-craftsmen, a carpenter, a horticulturalist. Mercury rules your 10^th house, so if your career has to do with any of the above, you can use this for work communications, writing for your career, learning new skill or abilities to advance in your career. Have fun with some friends from work!

Mercury is in your 4^th house in Sagittarius from Dec. 12 to the end of the month. This is nice for spending time outdoors at home, if possible. Bring something international into your home to make it more social. It can be nice for communications or connections with family, especially if they live far away or abroad. If you have a business that involves international affairs or other cultures, you can advance it with this by connecting with others and networking. You could advertise it as well. The emotions might be erratic and impact your mental states – avoid substance use, including alcohol. Mercury rules your 1^st house, so you can define your role at home, or in your family in a new way in accordance with your life philosophy. Mercury rules your 10^th house, so if you have a home business or small business, this is a good time to advertise, communicate with others about it, spread the word far.

Libra Rising

Mercury is in your 2^nd house in Scorpio from December 1 to 11. This time is good for counseling others about their critical resources (e.g., money, bodies, possessions). You can try to make more money from communications, reading, writing, connecting others with goods, or counseling. If you work with small electronics or sell them, this is a time where you can make more money if from your work. You can write up plans or strategies for managing your money, body, or possessions. Mercury rules your 12^th house, so use spiritual techniques for your management of resources. If you are a doctor or work in hospitals, you may be busy. Take care of your mental health if you tend to obsessiveness or anxiety. Mercury rules your 9^th house, so there may be expenditures on travel, or you could travel for work. Employ some new philosophies or foreign ideas in your resource management. You can have gains from or expenditures related to travel, teaching, learning new things, things foreign, advertising, marketing, computers and tech.

Mercury is in your 3^rd house in Sagittarius from Dec. 12 to the end of the month. Here, you can do a lot of movement in local areas. You can write some fantastic stories or tell them orally. Take time to learn some new things on your own that develop your hand eye coordination, mental acuity, are about other cultures, ways or writing, and/or involve moving exercise. The nervous system is sensitized a bit – have soothing nervines like chamomile and lemon balm teas around. Take time to rest the mind as it can overstimulated easily and tend to anxiety/panic. Mercury rules your 12^th house, so learn new meditation, or breathing, or study some spiritual texts. Mercury rules your 9^th house, so travel is indicated – you may have to travel or move around a lot. If you need to publish, market or advertise anything, this is the time.

Scorpio Rising

Mercury is in your 1^st house in Scorpio from December 1 to 11. This is a time when you can work on your role as an intense or focused communicator. It is great for defining your role as a researcher or writer (especially on medical, occult, mysterious, and/or legal topics). You can connect deeply or intimately with others under this aspect. Your can develop your focused, penetrating mental abilities. This is good for using your mind to develop your self transformative practices. The colon can be spastic. There is danger of STIs under this one, so be careful with sex. The genitalia are sensitive. Mercury rules your 11^th house, so your role in the community, work groups, or as one who helps serve humanity can be enhanced. Mercury rules your 8th house, so your role as one who manages other’s critical resources through communicating with them can be a focus. This is good for self transformative work as well, using your mind.

Mercury is in your 2^nd house in Sagittarius from Dec. 12 to the end of the month. This is nice for advertising or marketing a business that you run, especially a sales business. You can write plans for a new exercise routine or a diet. You can use your communications, writing, or connecting with others skills, on a large or small scale, for making money. Mercury rules your 1^st house, so your role as one who helps other manage their resources can help you make money. It could be a time to blend your self-transformative work into your exercise and diet plans. Mercury rules your 8^th house, so this is much about how you use your communication skills, writing, abilities with connecting with others as part of your resource management.

Sagittarius Rising

Mercury is in your 12^th house in Scorpio from December 1 to 11. Here, you can dig deep into spiritual practices that involve the mind or breath work. You have to take care of the mental health, as nervous strain and obsessiveness are both possible. Sex can be a focus (this is the house of bed pleasures and sign of sex), but do not overdo it. Use your mind, communicative powers or writing to help those in great need. This is great for social work or psychology. Mercury rules your 10^th house, so if you work in a prison, hospital or mental health facility, an ashram or the remote wilderness, you may have lots of work. There can be hidden enemies at work. Be careful of how work communications are interpreted. Mercury rules your 7^th house, so partners can be secret enemies or have secrets to keep from you. They may have some mental health needs. They could also be emotionally connected and want more sex.

Mercury is in your 1^st house in Sagittarius from Dec. 12 to the end of the month. This is a time when you can improve your role as a communicator, one who connects others to ideas or products, a teacher, a writer. Your ability connect with others who share a life philosophy can be a focus. Communicating your own life philosophy to others is good during this time. Take care with travel as you can get little bumps and bruises. Take time to run, bike, or hike – bring your partner! The nervous system requires extra attention – you are sensitive! Soothing creams can be good if your sciatic acts up. Mercury rules your 10^th house, so your role in your career as one who connects with others, using writing, communicates ideas, sells products, works with tech, can be emphasized. Mercury rules your 7^th house, so your partner will be more communicative – she or he is in your court! Enjoy time with them ☺

Capricorn Rising

Mercury is in your 11^th house in Scorpio from December 1 to 11. You can take time attend events that are related to work, or that are serious or have some intense focus – something mysterious or occult too. Attending technical or scientific events can be nice too under this one. Group communications are a focus – you could give talks under this one about topics on which you have focused and have expertise. This can be good for learning more about how to manage the resources of a large group or company. Communications with friends can be nice, but you may feel like covering topics that are not surficial. Be sure any mass emails or group communications are well thought out. You can use these to connect with institutions, companies, and not profit orgs, especially ones that are in the medical, legal, or financial fields. Mercury rules your 9th house, so connecting and communicating with a lot of people is part of this transit. Directing and producing events can be strong here – probably you work from behind the scenes on the details. You may have to travel or want to for the events listed above, or just take a trip with friends. Mercury rules your 6^th house, so you can attend group events about health and diet. If you are in the corporate world, or are the medical or legal fields, you may have more daily work and bigger projects. It could be lots of work communications.

Mercury is in your 12^th house in Sagittarius from Dec. 12 to the end of the month. This is one for intense exploration and study into spiritual or etheric topics, like astrology or tarot. Go on a spiritual adventure to learn more about other cultures spiritual practices. This one can be important for mental recharging and balancing the nervous system. It is a more anxious, and over energized time for the mind – look to soothing practices and nervines for help (always consult with a licensed healthcare practitioner before taking herbs). You may feel like visiting a remote place for adventure. Communications in or visits to places like hospitals, mental health institutions, prisons, and/or ashrams may arise. Mercury rules your 9^th house, so see if you want to study things toa align your spiritual work with your life philosophy. You can definitely travel for pilgrimages under this one. Maybe conduct teaching or do work in the 12^th house places already mentioned. Mercury rules your 6^th house, so put spiritual practices into your daily routine. Again, the nervous system is under pressure. The lungs need sensitive treatment as well since they can be hotter and dryer.

Aquarius Rising

Mercury is in your 10^th house in Scorpio from December 1 to 11. Here, communications related to work are best done strategically and with focus. If your work involves writing, put energy into that part of the work. Same for if it requires detection, investigations or research. Do not be emotional in these communications; plan them well. If you need to make career connections, this is nice for that; pick and choose your targets well. The boss might be a bit picky or overly attentive, so be her or his good side! Communications with Mom or Dad (hard to tell, though traditionally, this house is Dad) can be intense but you may feel like divulging important information to them; be sure it is not hurtful as they may stay feeling that way under this aspect. Mercury rules your 8^th house, so if your career involves research, medical or legal work, financial work or otherwise helping others manage their critical resources, this is a nice time to look for promotions or further your cause. This one is good for data analysis as a career too. You could even find a new job with Mercury stationing here. Mercury rules your 5^th house, so you can try to bring some fun to your job. You could meet a romantic interest at work or have someone become romantically interested in you. Outcome is based on aspects to your natal chart. ☺

Mercury is in your 11^th house in Sagittarius from Dec. 12 to the end of the month. Here you can make big connections with large groups, corporations or big not-profits – big organizations. You can guide large scale communications for these groups or events, like advertising or marketing. You can attend big events where you learn, like group art or music classes. Attending festivals and art shows may be fun too. Writing, reading and communicating about humanitarian ideas that connect with your life philosophy is great at this time. Contribute some energy to connecting with organizations that fit the same description. You can use this energy to have nice conversations or spend time with friend groups or older siblings. This can be a fun energy. You can teach other people’s children, maybe about writing or reading, but really about anything. Spend some time writing or thinking about your hopes and dreams. Consider how ideas from other cultures impact you. Go to cultural or internationally based events. Get out and be social, unless Mercury is squaring or opposing your Mercury or Mars. Mercury rules your 8^th house, so you can research these topics that you care about as well. You could attend or speak at events that relate to finance, the law, or medicine as well, if those are your topics of interest. Mercury rules your 5^th house, so this is a doubly fun time, showing that you can focus on doing some enjoyable activities where you connect with groups of people that share your values. Bring your kids along, if you have them!

Pisces Rising

Mercury is in your 9^th house in Scorpio from December 1 to 11. This is great for travel to faraway places, if the Mercury aspect supports your natal Mars and Mercury. You can spend time studying about or learning about other cultures, especially their deeper meanings and experiences, but also their medical, legal or financial systems. This can be a good time to start or apply to an institution of higher learning, if other aspects support it. It is good for teaching at one as well – be a strong presence if that is your job. You can publish under this one – send in a piece for publication! Mercury rules your 7^th house, so you can travel with a partner and enjoy it. You can study some new ideas with a partner as well. Have a partner help you with advertising your home business. Mercury rules your 4^th house, so if you have a hoe or small business, advertise or market for it, and use strategy and be serious and focused – Scorpio style. You can travel to see family abroad or communicate with them more at this time.

Mercury is in your 10^th house in Sagittarius from Dec. 12 to the end of the month. This is a big time for making connections related to your career. Work communications might be hectic or there might be more of them to deal with – stay calm and reread all of your replies. If you are agitated, do not hit “Send”, wait a few hours before responding to such a work email. You can spend time writing for work, or doing advertising or marketing, if that is within the scope of your role or job duties. Traveling for work may happen. Try to reduce anxiety related to work; this could be a bit of an anxious period. Bosses may be overly communicative and impatient – grin and bear it ☺ Mercury rules your 7^th house, so you can form nice partnerships for or at work; they could be personal or business oriented. You may meet someone at work! One on one counseling and consulting work can be quite strong, especially in medical or labor-oriented fields. Mercury rules your 4^th house, so if you run a home business or small business, do a lot of advertising because you can be really visible. Talk about it to lots of people and make new connections! Mom or Dad might be in touch more too – tend to their needs but do not let them press your buttons; stay calm, cool, and collected, not like the responsive teenager you might have been ☺