Sonoma Weather in January
January in Sonoma typically sees daytime highs of 15°C (59°F) and nighttime lows of 4°C (39°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.
Rainfall in Sonoma in January
Looking at the last 30 years, the data shows about 9 days with rain, averaging 105 mm (4.1 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Sonoma in January
Sonoma in January gets highs of 15°C (59°F) during the day and drops to 4°C (39°F) at night. The month of January belongs to the winter season. The difference between afternoon and evening temperatures is usually noticeable. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Sonoma in January
Enjoy a sunny month with about 190 hours of sunshine, making it one of the brighter months of the year despite the cool conditions.If you're looking for dry conditions and comfortable temperatures, January may not be the ideal month to visit Sonoma. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Sonoma's climate page.
Sonoma Temperature in January
Min Temperature
4°C (39°F)
Max Temperature
15°C (59°F)
Chance of Rain
30%
Precipitation
105 mm (4.1 in)
Rainy days
9 days
Sunshine
190 hours *
Percentage Sunshine
60% *
Best Places in the United States of America in January
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in January →
perfect weather
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unpleasant
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What to Wear in Sonoma in January
The weather can swing between comfortable and chilly in January, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Sonoma in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Sonoma's climate page.
See the full Sonoma climate overview or explore weather in the United States of America.
