Weather on May 20
Santa Rosa, CA
55 Years of Data
Avg High
75°F
Avg Low
48°F
Warmest
1983
74°F avg
Coldest
1981
52°F avg
About This Date
May 20th in Santa Rosa, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 48°F — a 27°F daily swing. Over 55 years of records, the warmest May 20th was in 1983 (74°F average), while the coldest was 1981 (52°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 15% of May 20th dates historically, with the wettest May 20th recording 2.03" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for May 20th in Santa Rosa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 52° | 69° | — | — |
| 2024 | 75° | 50° | 63° | — | — |
| 2023 | 72° | 50° | 61° | — | — |
| 2022 | 88° | 49° | 68° | — | — |
| 2021 | 76° | 47° | 61° | — | — |
| 2020 | 74° | 42° | 58° | — | — |
| 2019 | 67° | 43° | 55° | 0.03" | — |
| 2018 | 74° | 47° | 60° | — | — |
| 2017 | 87° | 55° | 71° | — | — |
| 2016 | 65° | 47° | 56° | — | — |
| 2015 | 65° | 48° | 56° | — | — |
| 2014 | 72° | 49° | 60° | — | — |
| 2013 | 85° | 50° | 67° | — | — |
| 2012 | 79° | 48° | 63° | — | — |
| 2011 | 71° | 42° | 57° | — | — |
| 2010 | 72° | 42° | 57° | 0.03" | — |
| 2009 | 75° | 45° | 60° | — | — |
| 2008 | 75° | 49° | 62° | — | — |
| 2007 | 80° | 47° | 63° | — | — |
| 2006 | 68° | 47° | 57° | 0.46" | — |
| 2005 | 71° | 45° | 58° | — | — |
| 2004 | 71° | 45° | 58° | — | — |
| 2003 | 84° | 51° | 68° | — | — |
| 2002 | 58° | 47° | 52° | 1.04" | — |
| 2001 | 90° | 49° | 69° | — | — |
| 2000 | 90° | 54° | 72° | — | — |
| 1999 | 67° | 45° | 56° | — | — |
| 1998 | 65° | 43° | 54° | — | — |
| 1997 | 75° | 52° | 63° | — | — |
| 1996 | 69° | 47° | 58° | — | — |
| 1995 | 70° | 50° | 60° | — | — |
| 1994 | 67° | 49° | 58° | — | — |
| 1993 | 69° | 58° | 63° | 0.05" | — |
| 1992 | 76° | 50° | 63° | — | — |
| 1991 | 67° | 42° | 54° | — | — |
| 1990 | 64° | 52° | 58° | 2.03" | — |
| 1989 | 76° | 47° | 61° | — | — |
| 1988 | 92° | 53° | 72° | — | — |
| 1987 | 63° | 44° | 53° | — | — |
| 1986 | 66° | 47° | 56° | — | — |
| 1985 | 71° | 45° | 58° | — | — |
| 1984 | 77° | 53° | 65° | — | — |
| 1983warmest | 92° | 56° | 74° | — | — |
| 1982 | 74° | 45° | 59° | — | — |
| 1981coldest | 63° | 42° | 52° | 0.36" | — |
| 1980 | 85° | 49° | 67° | — | — |
| 1979 | 67° | 54° | 60° | — | — |
| 1978 | 91° | 49° | 70° | — | — |
| 1977 | 83° | 45° | 64° | — | — |
| 1976 | 79° | 42° | 60° | — | — |
| 1975 | 73° | 44° | 59° | — | — |
| 1974 | 70° | 38° | 54° | — | — |
| 1973 | 77° | 44° | 61° | — | — |
| 1972 | 63° | 49° | 56° | 0.1" | — |
| 1971 | 77° | 44° | 61° | — | — |
55 years of data from SANTA ROSA