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Weather in Sunnyvale, CA · National Weather Service + NOAA

It hardly ever freezes in Sunnyvale

Sunnyvale has warm winters and pleasant summers, with very little rain. A typical July afternoon reaches 80°, a January night drops to 41°, and snow is almost unheard of. A typical November afternoon reaches 66°, and nights fall to 45°.

Winter 61°/42°Spring 69°/47°Summer 79°/55°Fall 73°/50°
Right now
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Sunrise 9:34 am · sunset 8:09 pm

Getting the latest forecast from the National Weather Service…

What stands out about Sunnyvale’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
It hardly ever freezesOnly 70% of years see a night at 32° or below.Snow is rareNo measurable snow in a normal year.The mildest winters aroundMilder January nights than all 6 towns around it.A dry climateJust 16 inches of rain and melted snow a year, less than 93% of U.S. towns.
A normal year

Where today sits in Sunnyvale’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
61° / 42°
Snow is rare
Spring
69° / 47°
Frost is rare by spring
Summer
79° / 55°
9 days reach 90° in a normal year
Fall now
73° / 50°
Mild well into the fall
Best months to be outside
FebMarAprMayJunJulAugSepOctNov
Highs of 62–84° and lows of 40° or more
How much snow does Sunnyvale get?Almost none.When is it wettest?February, with 3.4 inches.Is it warmer than it used to be?+1.8° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Sunnyvale.

Town Square →
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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Sunnyvale itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Palo Alto, CA (7 mi, snow) and Moffett Federal Airfield, CA (2 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.