Santa Rosa
January
Weather in Santa Rosa for January 2026
Your guide to Santa Rosa weather in January - trends and predictions
In general, the average temperature in Santa Rosa at the beginning of January is 13.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 13.7 °F by the end of January.
Santa Rosa experiences moderate rainfall in January, with an average of 10 rainy days and a total precipitation of 141 mm.
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Temperatures
Rain 🌧️
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21
Dry days
10
Rainy days
0
Snow days
13°/5°
Temperatures
10 km/h
Avg max wind
78 %
Avg humidity
Santa Rosa Weather January
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  13° | 2  14° | 3  11° | ||||
| 4  12° | 5  15° | 6  13° | 7 14° | 8 15° | 9  14° | 10 13° |
| 11 14° | 12 13° | 13  13° | 14 15° | 15 16° | 16 13° | 17 11° |
| 18 11° | 19 11° | 20 14° | 21 14° | 22 15° | 23 17° | 24 13° |
| 25 14° | 26 14° | 27 16° | 28 16° | 29 12° | 30 13° | 31 11° |
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Temperatures trend during January in Santa Rosa
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 | Sunny | 13° /4° | 0 mm | 4 | |
| Jan. 2 | Overcast | 14° /7° | 9.4 mm | 3 | |
| Jan. 3 | Moderate or heavy rain with thunder | 11° /6° | 24.4 mm | 3 | |
| Jan. 4 | Partly cloudy | 12° /4° | 0 mm | 4 | |
| Jan. 5 | Mist | 15° /3° | 0 mm | 4 | |
| Jan. 6 | Light rain shower | 13° /6° | 3.2 mm | 3 | |
| Jan. 7 | Sunny | 14° /3° | 0 mm | 5 | |
| Jan. 8 | Overcast | 15° /4° | 0 mm | 4 | |
| Jan. 9 | Light drizzle | 14° /3° | 0.3 mm | 4 | |
| Jan. 10 | Light rain shower | 13° /4° | 0.7 mm | 4 | |
| Jan. 11 | Partly cloudy | 14° /3° | 0 mm | 5 | |
| Jan. 12 | Partly cloudy | 13° /3° | 0 mm | 4 | |
| Jan. 13 | Moderate rain | 13° /3° | 14.5 mm | 4 | |
| Jan. 14 | Patchy rain possible | 15° /6° | 0.1 mm | 4 | |
| Jan. 15 | Partly cloudy | 16° /3° | 0 mm | 4 | |
| Jan. 16 | Light rain | 13° /5° | 4.9 mm | 4 | |
| Jan. 17 | Mist | 11° /4° | 0 mm | 3 | |
| Jan. 18 | Partly cloudy | 11° /5° | 0 mm | 3 | |
| Jan. 19 | Light rain shower | 11° /5° | 7.4 mm | 3 | |
| Jan. 20 | Moderate or heavy rain with thunder | 14° /6° | 26.5 mm | 4 | |
| Jan. 21 | Light drizzle | 14° /5° | 0.9 mm | 4 | |
| Jan. 22 | Light rain shower | 15° /5° | 10.9 mm | 5 | |
| Jan. 23 | Mist | 17° /6° | 0 mm | 5 | |
| Jan. 24 | Moderate rain | 13° /6° | 2.6 mm | 4 | |
| Jan. 25 | Mist | 14° /5° | 0 mm | 4 | |
| Jan. 26 | Patchy rain possible | 14° /6° | 0 mm | 4 | |
| Jan. 27 | Patchy rain possible | 16° /5° | 0 mm | 4 | |
| Jan. 28 | Sunny | 16° /6° | 0 mm | 5 | |
| Jan. 29 | Sunny | 12° /6° | 0 mm | 4 | |
| Jan. 30 | Partly cloudy | 13° /7° | 0 mm | 4 | |
| Jan. 31 | Moderate rain | 11° /8° | 35 mm | 3 | |
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Important Notice
Our weather forecast for Santa Rosa in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Santa Rosa forecast closer to your planned date for the most up-to-date weather information.
Santa Rosa in January - FAQ
What are the expected maximum and minimum temperatures in Santa Rosa during January?
During January, expect a variety of temperatures with highs around 13° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Santa Rosa during January?
Significant rainfall exceeding 141 mm is expected in Santa Rosa during January, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Santa Rosa during January?
The average wind speed in Santa Rosa during January is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in Santa Rosa
Explore the daily rainfall trends and prepare for Santa Rosas January weather 💧
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