The temperatures in Sunnyvale in October are comfortable with low of 55°F and and high up to 75°F.
The wather in Sunnyvale in October can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Sunnyvale in October 2025.
If you’re planning to visit Sunnyvale in the near future, we highly recommend that you review the 14 day weather forecast for Sunnyvale before you arrive.
Temperatures
75° / 55°
Rainy Days
1
Snowy Days
0
Dry Days
30
Rainfall
1.18
in
Sun Hours
11.5
Hrs
