Sonoma County (Santa Rosa)
October
Weather in Sonoma County, California for October 2027
Your guide to Sonoma County weather in October - trends and predictions
In general, the average temperature in Sonoma County at the beginning of October is 30.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of October.
With an average of 3 rainy days, Sonoma County experiences minimal rainfall in October.
Is October a good time to visit Sonoma County? check out the best time to travel to Sonoma County page.
✨ Is October a good time to visit Sonoma County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
28
Dry days
3
Rainy days
0
Snow days
24°/10°
Temperatures
12 km/h
Avg max wind
62 %
Avg humidity
Sonoma County Weather October
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Temperatures trend during October in Sonoma County
See the weather trend as well as the moving average line
October weather in Sonoma County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Light rain | 27° /13° | 3.5 mm | 5.9 | |
| Oct. 2 |  Cloudy | 28° /12° | 0 mm | 5 | |
| Oct. 3 |  Partly cloudy | 31° /12° | 0 mm | 5.8 | |
| Oct. 4 |  Sunny | 30° /14° | 0 mm | 5.7 | |
| Oct. 5 | Sunny | 32° /14° | 0 mm | 5.6 | |
| Oct. 6 | Sunny | 34° /16° | 0 mm | 5.5 | |
| Oct. 7 | Sunny | 34° /15° | 0 mm | 5.4 | |
| Oct. 8 | Sunny | 27° /11° | 0 mm | 5.3 | |
| Oct. 9 | Light drizzle | 21° /11° | 1.1 mm | 5 | |
| Oct. 10 |  Mist | 21° /9° | 0.1 mm | 5 | |
| Oct. 11 | Sunny | 20° /9° | 0 mm | 5 | |
| Oct. 12 | Cloudy | 21° /8° | 0 mm | 5 | |
| Oct. 13 | Light rain | 21° /9° | 5.7 mm | 4 | |
| Oct. 14 | Light rain | 21° /11° | 4.1 mm | 4 | |
| Oct. 15 | Mist | 26° /11° | 0 mm | 4.7 | |
| Oct. 16 | Mist | 24° /11° | 0 mm | 4 | |
| Oct. 17 | Mist | 27° /10° | 0 mm | 4.6 | |
| Oct. 18 | Partly cloudy | 27° /9° | 0 mm | 4.5 | |
| Oct. 19 | Sunny | 27° /11° | 0 mm | 4.4 | |
| Oct. 20 | Partly cloudy | 26° /11° | 0.3 mm | 4.3 | |
| Oct. 21 | Mist | 22° /10° | 0.2 mm | 4 | |
| Oct. 22 |  Patchy rain possible | 17° /10° | 1.9 mm | 3 | |
| Oct. 23 | Mist | 22° /9° | 0 mm | 4.1 | |
| Oct. 24 | Mist | 23° /9° | 0 mm | 4 | |
| Oct. 25 | Light rain | 21° /10° | 4.3 mm | 4 | |
| Oct. 26 | Patchy rain possible | 20° /8° | 2.3 mm | 3.9 | |
| Oct. 27 |  Overcast | 20° /9° | 0.2 mm | 3.8 | |
| Oct. 28 | Partly cloudy | 20° /6° | 0 mm | 3.8 | |
| Oct. 29 | Sunny | 22° /8° | 0 mm | 3.7 | |
| Oct. 30 | Mist | 19° /8° | 0.8 mm | 3.6 | |
| Oct. 31 | Light rain | 21° /7° | 3.4 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Sonoma County in October 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 Sonoma County forecast closer to your planned date for the most up-to-date weather information.
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Sonoma County in October - FAQ
What are the expected maximum and minimum temperatures in Sonoma County during October?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sonoma County during October?
In October, Sonoma County can expect light to moderate rainfall, totaling 28.2 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Sonoma County during October?
The average wind speed in Sonoma County during October is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Sonoma County
Explore the daily rainfall trends and prepare for Sonoma Countys October weather 💧
Typically, Sonoma County has 3 rainy days in October with a total of 28.2 mm of rainfall.
UV exposure in Sonoma County during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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