Weather on October 18
Fairfield, CA
55 Years of Data
Avg High
80°F
Avg Low
50°F
Warmest
2020
77°F avg
Coldest
1984
50°F avg
About This Date
October 18th in Fairfield, CA typically brings warm fall weather, with average highs around 80°F and lows near 50°F — a 30°F daily swing. Over 55 years of records, the warmest October 18th was in 2020 (77°F average), while the coldest was 1984 (50°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of October 18th dates historically, with the wettest October 18th recording 0.56" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Fairfield, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 52° | 64° | — | — |
| 2024 | 79° | 59° | 69° | — | — |
| 2023 | 90° | 56° | 73° | — | — |
| 2022 | 88° | 57° | 72° | — | — |
| 2021 | 65° | 43° | 54° | 0.08" | — |
| 2020warmest | 92° | 62° | 77° | — | — |
| 2019 | 72° | 50° | 61° | — | — |
| 2018 | 81° | 47° | 64° | — | — |
| 2017 | 78° | 48° | 63° | — | — |
| 2016 | 74° | 48° | 61° | — | — |
| 2015 | 86° | 59° | 73° | — | — |
| 2014 | 79° | 56° | 67° | — | — |
| 2013 | 83° | 50° | 66° | — | — |
| 2012 | 88° | 56° | 72° | — | — |
| 2011 | 86° | 56° | 71° | — | — |
| 2010 | 58° | 50° | 54° | 0.56" | — |
| 2009 | 82° | 58° | 70° | — | — |
| 2008 | 87° | 52° | 69° | — | — |
| 2007 | 68° | 50° | 59° | 0.38" | — |
| 2006 | 77° | 52° | 64° | — | — |
| 2005 | 88° | 54° | 71° | — | — |
| 2004 | 68° | 46° | 57° | — | — |
| 2003 | 82° | 53° | 68° | — | — |
| 2002 | 70° | 46° | 58° | — | — |
| 2001 | 85° | 46° | 65° | — | — |
| 2000 | 82° | 49° | 65° | — | — |
| 1999 | 84° | 49° | 66° | — | — |
| 1998 | 77° | 46° | 62° | — | — |
| 1997 | 88° | 51° | 69° | — | — |
| 1996 | 78° | 46° | 62° | — | — |
| 1995 | 87° | 51° | 69° | — | — |
| 1994 | 77° | 46° | 62° | — | — |
| 1993 | 77° | 51° | 64° | — | — |
| 1992 | — | 54° | — | — | — |
| 1991 | 87° | 54° | 70° | — | — |
| 1990 | 70° | 51° | 60° | — | — |
| 1989 | 87° | 55° | 71° | — | — |
| 1988 | 91° | 58° | 74° | — | — |
| 1987 | 87° | 54° | 70° | — | — |
| 1986 | 70° | 49° | 59° | — | — |
| 1985 | 85° | 43° | 64° | — | — |
| 1984coldest | 65° | 36° | 50° | 0.03" | — |
| 1983 | 86° | 47° | 66° | — | — |
| 1982 | 78° | 46° | 62° | — | — |
| 1981 | 78° | 45° | 61° | — | — |
| 1980 | 75° | 39° | 57° | — | — |
| 1979 | 81° | 54° | 67° | — | — |
| 1978 | 80° | 51° | 66° | — | — |
| 1977 | 75° | 49° | 62° | — | — |
| 1976 | 84° | 47° | 65° | — | — |
| 1975 | 76° | 48° | 62° | — | — |
| 1974 | 89° | 50° | 70° | — | — |
| 1973 | 84° | 53° | 69° | — | — |
| 1972 | 71° | 54° | 62° | — | — |
| 1971 | 66° | 38° | 52° | — | — |
55 years of data from FAIRFIELD