Weather on March 18
Fairfield, CA
55 Years of Data
Avg High
68°F
Avg Low
45°F
Warmest
2026
69°F avg
Coldest
1982
45°F avg
About This Date
March 18th in Fairfield, CA typically brings mild spring weather, with average highs around 68°F and lows near 45°F. Over 56 years of records, the warmest March 18th was in 2026 (69°F average), while the coldest was 1982 (45°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 29% of March 18th dates historically, with the wettest March 18th recording 1.68" of rain. The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
Planning for March 18th in Fairfield, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 86° | 51° | 69° | — | — |
| 2025 | 62° | 40° | 51° | — | — |
| 2024 | 74° | 46° | 60° | — | — |
| 2023 | 68° | 42° | 55° | — | — |
| 2022 | 73° | 43° | 58° | — | — |
| 2021 | 54° | 47° | 50° | 1.68" | — |
| 2020 | 55° | 45° | 50° | 0.13" | — |
| 2019 | 74° | 46° | 60° | — | — |
| 2018 | 57° | 35° | 46° | — | — |
| 2017 | 73° | 53° | 63° | — | — |
| 2016 | 72° | 47° | 59° | — | — |
| 2015 | 74° | 49° | 61° | — | — |
| 2014 | 71° | 44° | 58° | — | — |
| 2013 | 70° | 44° | 57° | — | — |
| 2012 | 55° | 38° | 46° | 0.08" | — |
| 2011 | 61° | 39° | 50° | 0.1" | — |
| 2010 | 75° | 47° | 61° | — | — |
| 2009 | 73° | 49° | 61° | — | — |
| 2008 | 73° | 45° | 59° | — | — |
| 2007 | 77° | 50° | 64° | — | — |
| 2006 | 64° | 40° | 52° | 0.58" | — |
| 2005 | 67° | 48° | 57° | — | — |
| 2004 | 85° | 52° | 68° | — | — |
| 2003 | 66° | 47° | 56° | — | — |
| 2002 | 64° | 38° | 51° | 0.38" | — |
| 2001 | 77° | 49° | 63° | — | — |
| 2000 | 75° | 51° | 63° | — | — |
| 1999 | 65° | 46° | 55° | — | — |
| 1998 | 72° | 46° | 59° | — | — |
| 1997 | 69° | 48° | 59° | — | — |
| 1996 | 77° | 51° | 64° | — | — |
| 1995 | 65° | 52° | 58° | 0.23" | — |
| 1994 | 64° | 48° | 56° | — | — |
| 1993 | 69° | 53° | 61° | 0.03" | — |
| 1992 | 65° | 43° | 54° | — | — |
| 1991 | 54° | 40° | 47° | 1.27" | — |
| 1990 | 74° | 45° | 59° | — | — |
| 1989 | 55° | 49° | 52° | 0.43" | — |
| 1988 | 76° | 43° | 59° | — | — |
| 1987 | 66° | 46° | 56° | — | — |
| 1986 | 68° | 44° | 56° | — | — |
| 1985 | 65° | 42° | 53° | 0.25" | — |
| 1984 | 64° | 39° | 52° | — | — |
| 1983 | 57° | 43° | 50° | 0.84" | — |
| 1982coldest | 55° | 36° | 45° | 0.74" | — |
| 1981 | 67° | 40° | 53° | 0.05" | — |
| 1980 | 66° | 41° | 54° | — | — |
| 1979 | 64° | 44° | 54° | — | — |
| 1978 | 76° | 52° | 64° | — | — |
| 1977 | 58° | 38° | 48° | — | — |
| 1976 | 72° | 48° | 60° | 0.1" | — |
| 1975 | 56° | 46° | 51° | 0.1" | — |
| 1974 | 72° | 47° | 59° | — | — |
| 1973 | 56° | 37° | 46° | — | — |
| 1972 | 73° | 46° | 60° | — | — |
| 1971 | 69° | 54° | 61° | — | — |
56 years of data from FAIRFIELD