Spring
68°F / 49°F
March, April, May: about 3.4 in of rain.
Plan a visit
Best time to visit Sunnyvale
June, July, August bring mild highs and the least rain.
Best time to visit
June · July · August
Highs between 65°F and 85°F with the least rain of the year. Hottest: September (78°F). Coldest nights: December (42°F). Wettest: February.
Sunnyvale by season
Month-by-month planner
| Month | Weather | High / low | Rain | Local guides |
|---|---|---|---|---|
| January | Wet | 59°F / 42°F | 2.5 in | |
| February | Wet | 62°F / 45°F | 2.9 in | Valentine’s Day |
| March | Wet | 65°F / 47°F | 2.0 in | St. Patrick’s Day |
| April | Great | 68°F / 49°F | 1.0 in | |
| May | Great | 72°F / 53°F | 0.40 in | |
| June | Great | 76°F / 56°F | 0.10 in | Fourth of July |
| July | Great | 77°F / 59°F | 0.00 in | Fourth of July |
| August | Great | 77°F / 59°F | 0.00 in | |
| September | Great | 78°F / 57°F | 0.10 in | Halloween |
| October | Great | 74°F / 53°F | 0.60 in | Halloween |
| November | Great | 66°F / 46°F | 1.4 in | Halloween, Thanksgiving, Christmas |
| December | Wet | 59°F / 42°F | 2.5 in | Christmas, New Year’s Eve |
“Great” means highs between 65°F and 85°F with fewer than 10 wet days. Averages are NOAA’s 1991–2020 normals for the Moffett Federal Airfield station, not a forecast.
Around Sunnyvale
See Sunnyvale before you go
THINGS TO DO · YOUTUBE SHORT
Exploring Downtown Sunnyvale with my fiancé’s cousin 🤗
A local activity Short shared by Belugabee.
Watch on YouTube ↗
THINGS TO DO · YOUTUBE SHORT
Is Downtown Sunnyvale Worth Visiting?
A local activity Short shared by Abdul’s World | Bay Area Travel.
Watch on YouTube ↗Questions
What is the best month to visit Sunnyvale?
June, July, August: highs between 65°F and 85°F with the least rain.
What is the hottest month in Sunnyvale?
September, averaging 78°F highs.
What is the coldest month in Sunnyvale?
December, with average lows of 42°F.
What is the rainiest month in Sunnyvale?
February, averaging 2.9 in of precipitation.
When are the big holidays in Sunnyvale?
See the local guides: Halloween (October), Thanksgiving (November), Christmas lights (late November to December), New Year’s Eve.