Weather on February 21
Sunnyvale, CA
55 Years of Data
Avg High
63°F
Avg Low
45°F
Warmest
1985
65°F avg
Coldest
2011
45°F avg
About This Date
February 21st in Sunnyvale, CA typically brings mild winter weather, with average highs around 63°F and lows near 45°F. Over 56 years of records, the warmest February 21st was in 1985 (65°F average), while the coldest was 2011 (45°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 39% of February 21st dates historically, with the wettest February 21st recording 2.08" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for February 21st in Sunnyvale, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 61° | 39° | 50° | — | — |
| 2025 | 66° | 45° | 55° | — | — |
| 2024 | 66° | 44° | 55° | — | — |
| 2023 | 59° | 44° | 52° | — | — |
| 2022 | 58° | 37° | 47° | — | — |
| 2021 | 64° | 39° | 52° | — | — |
| 2020 | 67° | 45° | 56° | — | — |
| 2019 | 57° | 42° | 50° | — | — |
| 2018 | 57° | 38° | 47° | — | — |
| 2017 | 60° | 46° | 53° | 1.04" | — |
| 2016 | 64° | 44° | 54° | — | — |
| 2015 | 71° | 46° | 59° | — | — |
| 2014 | 73° | 43° | 58° | — | — |
| 2013 | 60° | 39° | 50° | — | — |
| 2012 | 65° | 46° | 55° | — | — |
| 2011coldest | 55° | 35° | 45° | — | — |
| 2010 | 56° | 49° | 52° | 0.69" | — |
| 2009 | 64° | 43° | 53° | 0.13" | — |
| 2008 | 59° | 47° | 53° | 0.2" | — |
| 2007 | 59° | 53° | 56° | — | — |
| 2006 | 61° | 34° | 47° | — | — |
| 2005 | 67° | 49° | 58° | 0.69" | — |
| 2004 | 57° | 45° | 51° | 0.13" | — |
| 2003 | 65° | 41° | 53° | — | — |
| 2002 | 71° | 53° | 62° | — | — |
| 2001 | 61° | 51° | 56° | — | — |
| 2000 | 64° | 49° | 56° | 0.08" | — |
| 1999 | 56° | 40° | 48° | 0.15" | — |
| 1998 | 55° | 48° | 52° | 1.8" | — |
| 1997 | 64° | 41° | 53° | — | — |
| 1996 | 60° | 49° | 54° | 2.08" | — |
| 1995 | 74° | 46° | 60° | — | — |
| 1994 | 59° | 39° | 49° | 0.66" | — |
| 1993 | 61° | 45° | 53° | 0.1" | — |
| 1992 | 68° | 56° | 62° | 0.1" | — |
| 1991 | 68° | 49° | 58° | — | — |
| 1990 | 69° | 46° | 58° | — | — |
| 1989 | 74° | 49° | 61° | — | — |
| 1988 | 66° | 45° | 55° | — | — |
| 1987 | 56° | 45° | 50° | 0.25" | — |
| 1986 | 68° | 47° | 57° | 0.03" | — |
| 1985warmest | 78° | 51° | 65° | — | — |
| 1984 | 56° | 45° | 50° | 0.3" | — |
| 1983 | 63° | 48° | 55° | — | — |
| 1982 | 67° | 53° | 60° | — | — |
| 1981 | 69° | 51° | 60° | — | — |
| 1980 | 63° | 54° | 58° | 0.23" | — |
| 1979 | 57° | 46° | 52° | 0.86" | — |
| 1978 | 67° | 48° | 57° | 0.03" | — |
| 1977 | 60° | 44° | 52° | 0.51" | — |
| 1976 | 69° | 37° | 53° | — | — |
| 1975 | 61° | 45° | 53° | — | — |
| 1974 | 55° | 37° | 46° | 0.15" | — |
| 1973 | 72° | 48° | 60° | — | — |
| 1972 | 65° | 51° | 58° | 0.15" | — |
| 1971 | 59° | 39° | 49° | — | — |
56 years of data from MOFFETT FED AIRFIELD