Weather on February 21
Sunnyvale, CA
55 Years of Data
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.
| 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° | — | — |
Sunnyvale, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Sunnyvale, CA Monthly Precipitation
Average rainfall per month, in inches.
Sunnyvale, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Sunnyvale, CA
Most pleasant months in Sunnyvale, CA: July, August.