Sunnyvale (CA)
October
Weather in Sunnyvale, California for October 2026
Your guide to Sunnyvale weather in October - trends and predictions
In general, the average temperature in Sunnyvale at the beginning of October is 29.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of October.
With an average of 2 rainy days, Sunnyvale experiences minimal rainfall in October.
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Temperatures
Rain 🌧️
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29
Dry days
2
Rainy days
0
Snow days
24°/13°
Temperatures
11 km/h
Avg max wind
59 %
Avg humidity
Sunnyvale Weather October
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Temperatures trend during October in Sunnyvale
See the weather trend as well as the moving average line
October weather in Sunnyvale day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Partly cloudy | 26° /15° | 5.9 mm | 6 | |
| Oct. 2 | Partly cloudy | 28° /15° | 0 mm | 7 | |
| Oct. 3 |  Sunny | 27° /15° | 0 mm | 7 | |
| Oct. 4 | Sunny | 30° /16° | 0 mm | 7 | |
| Oct. 5 | Sunny | 31° /16° | 0 mm | 7 | |
| Oct. 6 | Sunny | 32° /17° | 0 mm | 7 | |
| Oct. 7 | Sunny | 33° /17° | 0 mm | 8 | |
| Oct. 8 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| Oct. 9 |  Patchy rain possible | 22° /13° | 0 mm | 5 | |
| Oct. 10 |  Cloudy | 23° /12° | 0 mm | 5 | |
| Oct. 11 |  Overcast | 21° /11° | 0 mm | 5 | |
| Oct. 12 | Cloudy | 21° /10° | 0 mm | 5 | |
| Oct. 13 | Overcast | 20° /13° | 13.8 mm | 4 | |
| Oct. 14 | Overcast | 19° /11° | 0 mm | 4 | |
| Oct. 15 | Cloudy | 22° /12° | 0 mm | 5 | |
| Oct. 16 |  Mist | 22° /12° | 0 mm | 5 | |
| Oct. 17 | Mist | 23° /11° | 0 mm | 5 | |
| Oct. 18 | Sunny | 27° /11° | 0 mm | 7 | |
| Oct. 19 | Sunny | 29° /13° | 0 mm | 8 | |
| Oct. 20 | Sunny | 28° /13° | 0 mm | 8 | |
| Oct. 21 | Overcast | 25° /13° | 0 mm | 6 | |
| Oct. 22 | Patchy rain possible | 21° /12° | 0 mm | 5 | |
| Oct. 23 | Mist | 22° /11° | 0 mm | 5 | |
| Oct. 24 | Cloudy | 21° /11° | 0 mm | 5 | |
| Oct. 25 | Overcast | 21° /12° | 0 mm | 5 | |
| Oct. 26 | Cloudy | 20° /11° | 0 mm | 5 | |
| Oct. 27 | Partly cloudy | 20° /11° | 0 mm | 5 | |
| Oct. 28 | Overcast | 21° /9° | 0 mm | 5 | |
| Oct. 29 | Sunny | 22° /9° | 0 mm | 6 | |
| Oct. 30 | Sunny | 18° /9° | 0 mm | 4 | |
| Oct. 31 | Overcast | 20° /10° | 0.2 mm | 5 | |
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Important Notice
Our weather forecast for Sunnyvale 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 Sunnyvale forecast closer to your planned date for the most up-to-date weather information.
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Sunnyvale in October - FAQ
What are the expected maximum and minimum temperatures in Sunnyvale during October?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sunnyvale during October?
Expect minimal rainfall in Sunnyvale during October, with a total of 20 mm over approximately 2 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Sunnyvale during October?
The average wind speed in Sunnyvale during October is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Sunnyvale
Explore the daily rainfall trends and prepare for Sunnyvales October weather 💧
Typically, Sunnyvale has 2 rainy days in October with a total of 20 mm of rainfall.
UV exposure in Sunnyvale during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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