Weather on May 18
Santa Rosa, CA
55 Years of Data
Avg High
75°F
Avg Low
48°F
Warmest
1997
77°F avg
Coldest
1974
49°F avg
About This Date
May 18th 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 18th was in 1997 (77°F average), while the coldest was 1974 (49°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 18% of May 18th dates historically, with the wettest May 18th recording 4.06" 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 18th in Santa Rosa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 52° | 67° | — | — |
| 2024 | 61° | 49° | 55° | — | — |
| 2023 | 76° | 51° | 63° | — | — |
| 2022 | 96° | 46° | 71° | — | — |
| 2021 | 83° | 44° | 63° | — | — |
| 2020 | 67° | 41° | 54° | 1.37" | — |
| 2019 | 68° | 47° | 57° | 1.32" | — |
| 2018 | 75° | 48° | 62° | — | — |
| 2017 | 81° | 51° | 66° | — | — |
| 2016 | 87° | 52° | 69° | — | — |
| 2015 | 66° | 48° | 57° | — | — |
| 2014 | 75° | 53° | 64° | — | — |
| 2013 | 80° | 48° | 64° | — | — |
| 2012 | 77° | 45° | 61° | — | — |
| 2011 | 66° | 40° | 53° | 1.02" | — |
| 2010 | 69° | 50° | 60° | 0.84" | — |
| 2009 | 76° | 55° | 65° | — | — |
| 2008 | 72° | 49° | 60° | — | — |
| 2007 | 71° | 43° | 57° | — | — |
| 2006 | 69° | 48° | 59° | — | — |
| 2005 | 60° | 47° | 53° | 4.06" | — |
| 2004 | 71° | 46° | 59° | — | — |
| 2003 | 75° | 47° | 61° | — | — |
| 2002 | 75° | 45° | 60° | — | — |
| 2001 | 86° | 54° | 70° | — | — |
| 2000 | 79° | 54° | 66° | — | — |
| 1999 | 69° | 52° | 60° | — | — |
| 1998 | 71° | 45° | 58° | — | — |
| 1997warmest | 91° | 62° | 77° | — | — |
| 1996 | 65° | 55° | 60° | 1.68" | — |
| 1995 | 71° | 51° | 61° | — | — |
| 1994 | 70° | 47° | 58° | — | — |
| 1993 | 69° | 51° | 60° | — | — |
| 1992 | 71° | 54° | 62° | — | — |
| 1991 | 61° | 48° | 54° | 0.03" | — |
| 1990 | 65° | 44° | 54° | — | — |
| 1989 | 70° | 45° | 57° | — | — |
| 1988 | 82° | 49° | 65° | — | — |
| 1987 | 64° | 47° | 55° | — | — |
| 1986 | 78° | 42° | 60° | — | — |
| 1985 | 70° | 43° | 56° | — | — |
| 1984 | 77° | 48° | 63° | — | — |
| 1983 | 84° | 51° | 68° | — | — |
| 1982 | 74° | 45° | 59° | — | — |
| 1981 | 74° | 54° | 64° | 0.53" | — |
| 1980 | 82° | 47° | 64° | — | — |
| 1979 | 84° | 45° | 64° | — | — |
| 1978 | 90° | 48° | 69° | — | — |
| 1977 | 70° | 42° | 56° | 0.1" | — |
| 1976 | 75° | 40° | 57° | — | — |
| 1975 | 79° | 48° | 63° | — | — |
| 1974coldest | 63° | 35° | 49° | 0.23" | — |
| 1973 | 87° | 48° | 68° | — | — |
| 1972 | 75° | 43° | 59° | — | — |
| 1971 | 80° | 44° | 62° | — | — |
55 years of data from SANTA ROSA