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Weather in Sunnyvale for October 2025

Your guide to Sunnyvale weather in October - trends and predictions

    Temperatures

  • In general, the average temperature in Sunnyvale at the beginning of October is 33.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °F by the end of October.

    • Rain 🌧️

  • Precipitation in Sunnyvale during October is a rare event, with an average of fewer than 2 rainy days.

    • More

  • Halloween weather in Sunnyvale 🎃 - See the complete forecast for Thursday, October 31.

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Average dry days
31
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/13°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
53 %
Avg humidity

Sunnyvale in October average weather

Move between months or click on a day
September
November
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
31°
2
Partly cloudy
32°
3
Sunny
33°
4
Sunny
33°
5
Sunny
35°
6
Sunny
34°
7
Sunny
34°
8
Sunny
29°
9
Patchy rain possible
23°
10
Cloudy
25°
11
Overcast
23°
12
Mist
23°
13
Overcast
22°
14
Overcast
21°
15
Cloudy
25°
16
Mist
23°
17
Mist
21°
18
Sunny
27°
19
Sunny
31°
20
Sunny
30°
21
Overcast
23°
22
Patchy rain possible
22°
23
Mist
23°
24
Cloudy
25°
25
Overcast
22°
26
Cloudy
22°
27
Partly cloudy
21°
28
Overcast
18°
29
Sunny
19°
30
Sunny
20°
31
Overcast
20°
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Access Sunnyvale weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
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Temperatures trend during October in Sunnyvale

See the weather trend as well as the moving average line

October weather day by day

Click on a date for more information
September November
Date Weather Temperatures Rain UV More
Oct. 1 Partly cloudy
Partly cloudy
 31° /16° 0 mm 8
Oct. 2 Partly cloudy
Partly cloudy
 32° /16° 0 mm 8
Oct. 3 Sunny
Sunny
 33° /17° 0 mm 8
Oct. 4 Sunny
Sunny
 33° /19° 0 mm 8
Oct. 5 Sunny
Sunny
 35° /19° 0 mm 9
Oct. 6 Sunny
Sunny
 34° /19° 0 mm 8
Oct. 7 Sunny
Sunny
 34° /18° 0 mm 9
Oct. 8 Sunny
Sunny
 29° /13° 0 mm 8
Oct. 9 Patchy rain possible
Patchy rain possible
 23° /12° 0.1 mm 6
Oct. 10 Cloudy
Cloudy
 25° /14° 0 mm 6
Oct. 11 Overcast
Overcast
 23° /11° 0 mm 5
Oct. 12 Mist
Mist
 23° /11° 0 mm 5
Oct. 13 Overcast
Overcast
 22° /13° 0 mm 5
Oct. 14 Overcast
Overcast
 21° /12° 0 mm 5
Oct. 15 Cloudy
Cloudy
 25° /13° 0 mm 6
Oct. 16 Mist
Mist
 23° /12° 0 mm 5
Oct. 17 Mist
Mist
 21° /12° 0 mm 5
Oct. 18 Sunny
Sunny
 27° /10° 0 mm 7
Oct. 19 Sunny
Sunny
 31° /14° 0 mm 8
Oct. 20 Sunny
Sunny
 30° /16° 0 mm 8
Oct. 21 Overcast
Overcast
 23° /12° 0 mm 5
Oct. 22 Patchy rain possible
Patchy rain possible
 22° /12° 0.1 mm 6
Oct. 23 Mist
Mist
 23° /11° 0 mm 6
Oct. 24 Cloudy
Cloudy
 25° /11° 0 mm 6
Oct. 25 Overcast
Overcast
 22° /12° 0 mm 5
Oct. 26 Cloudy
Cloudy
 22° /10° 0 mm 5
Oct. 27 Partly cloudy
Partly cloudy
 21° /12° 0 mm 5
Oct. 28 Overcast
Overcast
 18° /9° 0 mm 5
Oct. 29 Sunny
Sunny
 19° /7° 0 mm 5
Oct. 30 Sunny
Sunny
 20° /8° 0 mm 5
Oct. 31 Overcast
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.

Sunnyvale in October - FAQ

What are the expected maximum and minimum temperatures in Sunnyvale during October?
Enjoy moderate daytime temperatures of up to 25° 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?
Rainfall in Sunnyvale during October is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
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 💧

UV exposure in Sunnyvale during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️

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Location coordinates Where is Sunnyvale?

Get accurate weather forecasts for Sunnyvale, located at latitude 37.369 and longitude -122.036. Stay updated with localized weather information tailored for Sunnyvale.

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