Weather on April 20
Santa Rosa, CA
55 Years of Data
Avg High
69°F
Avg Low
46°F
Warmest
2009
73°F avg
Coldest
2001
44°F avg
About This Date
April 20th in Santa Rosa, CA typically brings mild spring weather, with average highs around 69°F and lows near 46°F. Over 55 years of records, the warmest April 20th was in 2009 (73°F average), while the coldest was 2001 (44°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 24% of April 20th dates historically, with the wettest April 20th recording 1.24" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for April 20th in Santa Rosa, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 47° | 58° | — | — |
| 2024 | 75° | 49° | 62° | — | — |
| 2023 | 69° | 44° | 57° | — | — |
| 2022 | 64° | 47° | 55° | — | — |
| 2021 | 75° | 43° | 59° | — | — |
| 2020 | 68° | 44° | 56° | — | — |
| 2019 | 73° | 52° | 62° | — | — |
| 2018 | 77° | 43° | 60° | — | — |
| 2017 | 69° | 49° | 59° | — | — |
| 2016 | 73° | 47° | 60° | — | — |
| 2015 | 65° | 50° | 57° | — | — |
| 2014 | 79° | 52° | 65° | — | — |
| 2013 | 78° | 53° | 66° | — | — |
| 2012 | 86° | 54° | 70° | — | — |
| 2011 | 61° | 44° | 52° | 0.2" | — |
| 2010 | 59° | 47° | 53° | 1.24" | — |
| 2009warmest | 93° | 54° | 73° | — | — |
| 2008 | 58° | 34° | 46° | — | — |
| 2007 | 65° | 44° | 54° | 1.14" | — |
| 2006 | 71° | 43° | 57° | — | — |
| 2005 | 64° | 40° | 52° | — | — |
| 2004 | 63° | 51° | 57° | 0.91" | — |
| 2003 | 67° | 44° | 55° | — | — |
| 2002 | 73° | 44° | 59° | — | — |
| 2001coldest | 49° | 40° | 44° | — | — |
| 2000 | 70° | 47° | 58° | — | — |
| 1999 | 72° | 53° | 62° | — | — |
| 1998 | 73° | 47° | 60° | — | — |
| 1997 | 69° | 56° | 62° | 0.1" | — |
| 1996 | 59° | 39° | 49° | — | — |
| 1995 | 62° | 46° | 54° | 0.28" | — |
| 1994 | 69° | 44° | 57° | — | — |
| 1993 | 70° | 44° | 57° | — | — |
| 1992 | 78° | 53° | 66° | — | — |
| 1991 | 62° | 49° | 55° | 0.41" | — |
| 1990 | 65° | 53° | 59° | — | — |
| 1989 | 72° | 51° | 61° | — | — |
| 1988 | 58° | 49° | 53° | 0.38" | — |
| 1987 | 76° | 42° | 59° | — | — |
| 1986 | 79° | 46° | 62° | — | — |
| 1985 | 57° | 44° | 51° | — | — |
| 1984 | 69° | 40° | 54° | — | — |
| 1983 | 65° | 51° | 58° | 0.56" | — |
| 1982 | 84° | 47° | 65° | — | — |
| 1981 | 56° | 43° | 49° | 0.1" | — |
| 1980 | 60° | 48° | 54° | 0.08" | — |
| 1979 | 68° | 34° | 51° | — | — |
| 1978 | 65° | 45° | 55° | 0.64" | — |
| 1977 | 80° | 38° | 59° | — | — |
| 1976 | 81° | 43° | 62° | — | — |
| 1975 | 76° | 40° | 58° | — | — |
| 1974 | 77° | 40° | 58° | — | — |
| 1973 | 72° | 43° | 57° | — | — |
| 1972 | 70° | 35° | 52° | — | — |
| 1971 | 60° | 44° | 52° | 0.1" | — |
55 years of data from SANTA ROSA