Best Time to Visit Sunnyvale
Best time: Jun, Jul, Aug, May.
Jul is warmest (27.8°C high); Jan is rainiest (87 mm).
Sunnyvale weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 15.6 | 5 | 87 | 3.2 |
| Feb | 17.6 | 6.5 | 71 | 4.4 |
| Mar | 18.8 | 7.4 | 71 | 6.9 |
| Apr | 21.5 | 7.9 | 34 | 9.1 |
| May | 24 | 10.3 | 6 | 10.7 |
| Jun | 26.4 | 12.5 | 2 | 12 |
| Jul | 27.8 | 13.7 | 1 | 11.9 |
| Aug | 27.8 | 13.9 | 2 | 10.7 |
| Sep | 27.3 | 12.9 | 6 | 8.8 |
| Oct | 24.7 | 10.4 | 25 | 6.4 |
| Nov | 19.4 | 6.9 | 65 | 4.1 |
| Dec | 15.9 | 4.6 | 63 | 3.1 |
Average high temperature
Best months by activity
Overall: JunJulAugMay
Beaches: JulAugJunSep
Hiking: JunJulMayAug
Sightseeing: JunJulAugMay
Sunnyvale quick facts
What to pack
Mild year-round — pack layers and a light jacket.
Frequently asked questions
When is the best time to visit Sunnyvale?
Jun, Jul, Aug, May.
What is the rainiest month?
Jan, about 87 mm.
What is the warmest month?
Jul, with average highs of 27.8°C.
Where to stay
See Sunnyvale hotels · Book Sunnyvale tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.