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Sunnyvale, CA All-Time Weather Extremes

The most extreme temperature, precipitation, and snowfall ever recorded in Sunnyvale, from NOAA daily weather observations.

Station: MOFFETT FED AIRFIELD
All-time weather extremes for Sunnyvale, CA, from NOAA daily observations at MOFFETT FED AIRFIELD
Temperature
Record High105.9°F (41°C)June 14, 2000 and September 1, 2017 and September 2, 2017
Record Low23°F (-5°C)December 23, 1990
Lowest High39°F (4°C)December 21, 1990
Highest Low75°F (24°C)September 3, 2017
Highest Mean88.5°F (31°C)September 2, 2017
Lowest Mean33.0°F (1°C)December 22, 1990 and December 23, 1990
Precipitation
Max in One Calendar Day3.36" (85.3 mm)December 11, 2014
Max in One Month8.54" (216.9 mm)December 2014
Least in One Month0.00" (0.0 mm)September 1979
Max in One Year31.41" (797.9 mm)1983
Least in One Year3.09" (78.6 mm)2013
Period of Record
TemperatureJanuary 1, 1970 – July 31, 2026
PrecipitationJanuary 1, 1970 – September 8, 2019
SnowfallJanuary 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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Sunnyvale, CA all-time weather extremes table — record high 105.9°F on June 14, 2000, record low 23°F on December 23, 1990, with precipitation and snowfall records from NOAA data

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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