Weather on May 18
Fairfield, CA
55 Years of Data
Avg High
79°F
Avg Low
51°F
Warmest
1997
82°F avg
Coldest
1974
51°F avg
About This Date
May 18th in Fairfield, CA typically brings pleasant spring weather, with average highs around 79°F and lows near 51°F — a 28°F daily swing. Over 55 years of records, the warmest May 18th was in 1997 (82°F average), while the coldest was 1974 (51°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 16% of May 18th dates historically, with the wettest May 18th recording 0.84" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in Fairfield, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 52° | 67° | — | — |
| 2024 | 74° | 54° | 64° | — | — |
| 2023 | 82° | 53° | 68° | — | — |
| 2022 | 95° | 54° | 74° | — | — |
| 2021 | 81° | 50° | 65° | — | — |
| 2020 | 69° | 51° | 60° | 0.48" | — |
| 2019 | 64° | 49° | 56° | 0.84" | — |
| 2018 | 76° | 53° | 64° | — | — |
| 2017 | 86° | 50° | 68° | — | — |
| 2016 | 93° | 61° | 77° | — | — |
| 2015 | 70° | 49° | 59° | — | — |
| 2014 | 77° | 55° | 66° | — | — |
| 2013 | 81° | 47° | 64° | — | — |
| 2012 | 83° | 49° | 66° | — | — |
| 2011 | 59° | 42° | 51° | 0.81" | — |
| 2010 | 70° | 51° | 60° | 0.28" | — |
| 2009 | 100° | 59° | 80° | — | — |
| 2008 | 99° | 64° | 81° | — | — |
| 2007 | 76° | 51° | 63° | — | — |
| 2006 | 85° | 53° | 69° | — | — |
| 2005 | 63° | 51° | 57° | 0.13" | — |
| 2004 | 77° | 51° | 64° | — | — |
| 2003 | 79° | 49° | 64° | — | — |
| 2002 | 69° | 47° | 58° | — | — |
| 2001 | 88° | 55° | 71° | — | — |
| 2000 | 77° | 50° | 64° | — | — |
| 1999 | 80° | 50° | 65° | — | — |
| 1998 | 70° | 42° | 56° | — | — |
| 1997warmest | 100° | 65° | 82° | — | — |
| 1996 | 65° | 56° | 60° | 0.2" | — |
| 1995 | 83° | 53° | 68° | — | — |
| 1994 | 73° | 50° | 62° | 0.03" | — |
| 1993 | 77° | 54° | 65° | — | — |
| 1992 | 78° | 55° | 67° | — | — |
| 1991 | 58° | 50° | 54° | 0.03" | — |
| 1990 | 69° | 50° | 60° | — | — |
| 1989 | 72° | 47° | 59° | — | — |
| 1988 | 84° | 50° | 67° | — | — |
| 1987 | 65° | 52° | 58° | — | — |
| 1986 | 98° | 47° | 72° | — | — |
| 1985 | 78° | 43° | 60° | — | — |
| 1984 | 84° | 51° | 68° | — | — |
| 1983 | 87° | 53° | 70° | — | — |
| 1982 | 76° | 44° | 60° | — | — |
| 1981 | 85° | 56° | 70° | 0.03" | — |
| 1980 | 92° | 57° | 74° | — | — |
| 1979 | 91° | 53° | 72° | — | — |
| 1978 | 83° | 64° | 73° | — | — |
| 1977 | 67° | 46° | 56° | — | — |
| 1976 | 73° | 46° | 60° | — | — |
| 1975 | 88° | 57° | 72° | — | — |
| 1974coldest | 64° | 38° | 51° | — | — |
| 1973 | 92° | 58° | 75° | — | — |
| 1972 | 70° | 46° | 58° | — | — |
| 1971 | 82° | 49° | 65° | — | — |
55 years of data from FAIRFIELD