Weather on April 18
Santa Rosa, CA
55 Years of Data
Avg High
69°F
Avg Low
43°F
Warmest
2016
70°F avg
Coldest
2004
47°F avg
About This Date
April 18th in Santa Rosa, CA typically brings mild spring weather, with average highs around 69°F and lows near 43°F — a 26°F daily swing. Over 55 years of records, the warmest April 18th was in 2016 (70°F average), while the coldest was 2004 (47°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 18% of April 18th dates historically, with the wettest April 18th recording 1.07" of rain. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for April 18th in Santa Rosa, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 49° | 58° | — | — |
| 2024 | 79° | 47° | 63° | — | — |
| 2023 | 61° | 38° | 49° | 0.1" | — |
| 2022 | 63° | 40° | 51° | — | — |
| 2021 | 90° | 41° | 65° | — | — |
| 2020 | 62° | 48° | 55° | — | — |
| 2019 | 85° | 46° | 65° | — | — |
| 2018 | 64° | 44° | 54° | — | — |
| 2017 | 67° | 48° | 57° | — | — |
| 2016warmest | 85° | 56° | 70° | — | — |
| 2015 | 75° | 47° | 61° | — | — |
| 2014 | 69° | 46° | 58° | — | — |
| 2013 | 74° | 52° | 63° | — | — |
| 2012 | 71° | 45° | 58° | — | — |
| 2011 | 68° | 50° | 59° | 0.03" | — |
| 2010 | 78° | 44° | 61° | — | — |
| 2009 | 80° | 42° | 61° | — | — |
| 2008 | 73° | 39° | 56° | — | — |
| 2007 | 72° | 37° | 54° | — | — |
| 2006 | 69° | 37° | 53° | — | — |
| 2005 | 70° | 40° | 55° | — | — |
| 2004coldest | 55° | 39° | 47° | 0.38" | — |
| 2003 | 66° | 40° | 53° | 0.05" | — |
| 2002 | 62° | 37° | 50° | — | — |
| 2001 | 64° | 43° | 53° | — | — |
| 2000 | 65° | 43° | 54° | — | — |
| 1999 | 73° | 48° | 61° | — | — |
| 1998 | 66° | 42° | 54° | — | — |
| 1997 | 75° | 52° | 63° | 0.56" | — |
| 1996 | 62° | 39° | 51° | 1.07" | — |
| 1995 | 62° | 43° | 52° | 0.15" | — |
| 1994 | 73° | 48° | 61° | — | — |
| 1993 | 64° | 44° | 54° | — | — |
| 1992 | 78° | 49° | 63° | — | — |
| 1991 | 60° | 41° | 51° | — | — |
| 1990 | 66° | 49° | 57° | — | — |
| 1989 | 74° | 48° | 61° | — | — |
| 1988 | 63° | 48° | 55° | — | — |
| 1987 | 60° | 43° | 51° | — | — |
| 1986 | 71° | 42° | 57° | — | — |
| 1985 | 64° | 40° | 52° | — | — |
| 1984 | 60° | 47° | 53° | 0.89" | — |
| 1983 | 62° | 49° | 55° | 0.03" | — |
| 1982 | 80° | 44° | 62° | — | — |
| 1981 | 68° | 49° | 58° | — | — |
| 1980 | 73° | 41° | 57° | — | — |
| 1979 | 67° | 31° | 49° | — | — |
| 1978 | 68° | 37° | 53° | — | — |
| 1977 | 83° | 44° | 63° | — | — |
| 1976 | 72° | 43° | 57° | — | — |
| 1975 | 65° | 36° | 50° | — | — |
| 1974 | 60° | 43° | 51° | 0.08" | — |
| 1973 | 67° | 37° | 52° | — | — |
| 1972 | 69° | 34° | 51° | — | — |
| 1971 | 69° | 43° | 56° | — | — |
55 years of data from SANTA ROSA