Historical Weather Records & Monthly Climate for Sunnyvale, CA

All-Time High
114°F
All-Time Low
24°F
Max Daily Snow
1.3"
Max Daily Rain
4.01"
Max Snow Depth
0

Monthly Climate Averages for Sunnyvale, CA

Based on 30 years of historical data (1994 - 2023)

MonthHigh (°F)Low (°F)Precip (in)Snow (in)
January58°44°4.83"0
February59°45°4.47"0.03"
March63°47°3.38"0.01"
April66°49°1.75"0
May71°52°0.83"0
June77°55°0.13"0
July81°58°0.04"0
August82°59°0.04"0
September80°59°0.13"0
October74°56°1.17"0
November64°49°2.39"0
December57°44°4.76"0

Historical Weather Extremes for Sunnyvale, CA

Based on 80+ years of archive data (1940 - 2024)

🔥
Longest Heatwave
11 Days
2006
Consecutive days ≥ 90°F
🧊
Deepest Freeze
0 Days
N/A
Consecutive days ≤ 32°F
🏜️
Longest Drought
160 Days
2020
Consecutive days w/o rain
Wettest Month
9.81"
December 2014
Most rainfall in one month
Snowiest Month
1.29"
December 1952
Most snowfall in one month

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