Sunnyvale, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Sunnyvale, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 105.9°F (41°C) | June 14, 2000 and September 1, 2017 and September 2, 2017 |
| Record Low | 23°F (-5°C) | December 23, 1990 |
| Lowest High | 39°F (4°C) | December 21, 1990 |
| Highest Low | 75°F (24°C) | September 3, 2017 |
| Highest Mean | 88.5°F (31°C) | September 2, 2017 |
| Lowest Mean | 33.0°F (1°C) | December 22, 1990 and December 23, 1990 |
| Precipitation | ||
| Max in One Calendar Day | 3.36" (85.3 mm) | December 11, 2014 |
| Max in One Month | 8.54" (216.9 mm) | December 2014 |
| Least in One Month | 0.00" (0.0 mm) | September 1979 |
| Max in One Year | 31.41" (797.9 mm) | 1983 |
| Least in One Year | 3.09" (78.6 mm) | 2013 |
| Period of Record | ||
| Temperature | January 1, 1970 – July 31, 2026 | |
| Precipitation | January 1, 1970 – September 8, 2019 | |
| Snowfall | January 1, 1970 – September 8, 2019 | |
Note: Records compiled from NOAA GHCN-Daily observations at MOFFETT FED AIRFIELD (2 mi from Sunnyvale, CA). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Sunnyvale, CA?
The all-time record high in Sunnyvale, CA is 105.9°F (41°C), set on June 14, 2000 and September 1, 2017 and September 2, 2017.
What is the coldest temperature ever recorded in Sunnyvale, CA?
The all-time record low in Sunnyvale, CA is 23°F (-5°C), set on December 23, 1990.
What is the most rain Sunnyvale, CA has ever had in one day?
The most precipitation recorded in one calendar day near Sunnyvale, CA is 3.36 inches, on December 11, 2014.
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Sunnyvale Weather History
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