Weather on May 21
Santa Rosa, CA
55 Years of Data
Avg High
74°F
Avg Low
48°F
Warmest
2000
80°F avg
Coldest
1986
54°F avg
About This Date
May 21st in Santa Rosa, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 48°F — a 26°F daily swing. Over 55 years of records, the warmest May 21st was in 2000 (80°F average), while the coldest was 1986 (54°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 21st dates historically, with the wettest May 21st recording 1.45" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 21st in Santa Rosa, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 49° | 65° | — | — |
| 2024 | 88° | 52° | 70° | — | — |
| 2023 | 79° | 52° | 65° | — | — |
| 2022 | 83° | 46° | 64° | — | — |
| 2021 | 78° | 43° | 60° | — | — |
| 2020 | 80° | 51° | 66° | — | — |
| 2019 | 65° | 50° | 57° | 0.13" | — |
| 2018 | 75° | 48° | 62° | — | — |
| 2017 | 88° | 50° | 69° | — | — |
| 2016 | 62° | 46° | 54° | — | — |
| 2015 | 67° | 51° | 59° | — | — |
| 2014 | 75° | 50° | 63° | — | — |
| 2013 | 71° | 48° | 60° | — | — |
| 2012 | 69° | 45° | 57° | — | — |
| 2011 | 74° | 46° | 60° | — | — |
| 2010 | 68° | 43° | 55° | — | — |
| 2009 | 75° | 47° | 61° | — | — |
| 2008 | 80° | 50° | 65° | — | — |
| 2007 | 82° | 47° | 64° | — | — |
| 2006 | 59° | 56° | 57° | 0.23" | — |
| 2005 | 77° | 47° | 62° | — | — |
| 2004 | 68° | 46° | 57° | — | — |
| 2003 | 84° | 49° | 66° | — | — |
| 2002 | 63° | 47° | 55° | 0.71" | — |
| 2001 | 91° | 50° | 71° | — | — |
| 2000warmest | 95° | 65° | 80° | — | — |
| 1999 | 76° | 51° | 63° | — | — |
| 1998 | 69° | 45° | 57° | — | — |
| 1997 | 74° | 46° | 60° | — | — |
| 1996 | 69° | 51° | 60° | 1.45" | — |
| 1995 | 61° | 51° | 56° | — | — |
| 1994 | 68° | 46° | 57° | — | — |
| 1993 | 71° | 53° | 62° | — | — |
| 1992 | 83° | 52° | 67° | — | — |
| 1991 | 72° | 47° | 59° | — | — |
| 1990 | 66° | 53° | 60° | 0.03" | — |
| 1989 | 67° | 45° | 56° | — | — |
| 1988 | 91° | 56° | 73° | — | — |
| 1987 | 62° | 47° | 54° | — | — |
| 1986coldest | 65° | 43° | 54° | — | — |
| 1985 | 74° | 45° | 59° | — | — |
| 1984 | 79° | 51° | 65° | — | — |
| 1983 | 77° | 51° | 64° | — | — |
| 1982 | 73° | 48° | 61° | — | — |
| 1981 | 72° | 46° | 59° | — | — |
| 1980 | 81° | 47° | 64° | — | — |
| 1979 | 62° | 54° | 58° | — | — |
| 1978 | 69° | 50° | 60° | — | — |
| 1977 | 82° | 45° | 63° | — | — |
| 1976 | 74° | 43° | 58° | — | — |
| 1975 | 83° | 43° | 63° | — | — |
| 1974 | 75° | 40° | 57° | — | — |
| 1973 | 74° | 43° | 58° | — | — |
| 1972 | 69° | 51° | 60° | 0.13" | — |
| 1971 | 75° | 43° | 59° | — | — |
55 years of data from SANTA ROSA