Santa Rosa Weather in January
January in Santa Rosa averages 15°C (59°F) during the day and 4°C (39°F) at night. Quite a bit of rainfall is typical this month, with around 111 mm (4.4 in) on average. An umbrella is a good idea.
Rainfall in Santa Rosa in January
Historically, approximately 10 days this month are expected to have rain, averaging 111 mm (4.4 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Santa Rosa in January
Expect highs of 15°C (59°F) in Santa Rosa in January, with nights dropping to around 4°C (39°F). During January, you'll experience the winter season. Conditions are often most pleasant around the middle of the day. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Santa Rosa in January
The month enjoys around 190 hours of sunshine, creating mostly sunny days with good weather conditions.January in Santa Rosa has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
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 Santa Rosa's climate page.
Santa Rosa Temperature in January
Min Temperature
4°C (39°F)
Max Temperature
15°C (59°F)
Chance of Rain
33%
Precipitation
111 mm (4.4 in)
Rainy days
10 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 Santa Rosa 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Santa Rosa 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 Santa Rosa's climate page.
See the full Santa Rosa climate overview or explore weather in the United States of America.
