Historical Weather in Sunnyvale, CA
See 55+ years of weather history for any date in Sunnyvale going back to 1970.
Part of California weather history
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Today in Sunnyvale Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for Sunnyvale, CA, based on 55+ years of weather data.
Warmest MonthSeptemberAvg High: 79°F / Low: 57°F
Coldest MonthDecemberAvg High: 58°F / Low: 42°F
Jan
59°/ 42°
💧 6.7"
Feb
62°/ 45°
💧 7.0"
❄️ 0.5"
Mar
66°/ 47°
💧 6.1"
Apr
69°/ 48°
💧 24.3"
May
74°/ 52°
💧 3.6"
Jun
78°/ 56°
💧 2.7"
Jul
79°/ 58°
💧 3.0"
Aug
79°/ 58°
💧 3.2"
Sep
79°/ 57°
💧 3.8"
Oct
74°/ 53°
💧 5.4"
Nov
65°/ 46°
💧 5.9"
Dec
58°/ 42°
💧 6.2"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Sunnyvale Temperature Records
- Record High: The hottest temperature ever recorded in Sunnyvale, CA is 112°F, set on August 3, 1998.
- Record Low: The coldest temperature ever recorded in Sunnyvale, CA is 19°F, set on December 22, 1990.
- Data Coverage: Based on 29 years of data from NOAA weather station: SAN JOSE.
All-Time Record High
112°F
August 3, 1998
All-Time Record Low
19°F
December 22, 1990
Monthly Temperature Records in Sunnyvale
| Month | Record High | Record Low |
|---|---|---|
| January | 79°F(2009) | 26°F(2007) |
| February | 81°F(1986) | 26°F(1989) |
| March | 91°F(2005) | 31°F(1971) |
| April | 100°F(2004) | 33°F(1976) |
| May | 104°F(2009) | 39°F(1975) |
| June | 111°F(2000) | 40°F(1999) |
| July | 111°F(2006) | 44°F(1999) |
| August | 112°F(1998) | 46°F(2005) |
| September | 112°F(2020) | 41°F(1971) |
| October | 107°F(2024) | 36°F(1971) |
| November | 86°F(1999) | 30°F(1971) |
| December | 76°F(2020) | 19°F(1990) |
Sunnyvale Snow RecordsSee the top 10 snowiest days ever recorded
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