Weather on August 17
Fairfield, CA
55 Years of Data
Avg High
90°F
Avg Low
57°F
Warmest
2020
88°F avg
Coldest
1975
64°F avg
About This Date
August 17th in Fairfield, CA typically brings hot summer weather, with average highs around 90°F and lows near 57°F — a 33°F daily swing. Over 55 years of records, the warmest August 17th was in 2020 (88°F average), while the coldest was 1975 (64°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for August 17th in Fairfield, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 60° | 70° | — | — |
| 2024 | 86° | 62° | 74° | — | — |
| 2023 | 96° | 65° | 80° | — | — |
| 2022 | 106° | 62° | 84° | — | — |
| 2021 | 90° | 61° | 75° | — | — |
| 2020warmest | 103° | 74° | 88° | — | — |
| 2019 | 87° | 64° | 76° | — | — |
| 2018 | 95° | 57° | 76° | — | — |
| 2017 | 88° | 58° | 73° | — | — |
| 2016 | 94° | 57° | 75° | — | — |
| 2015 | 102° | 66° | 84° | — | — |
| 2014 | 91° | 54° | 72° | — | — |
| 2013 | 91° | 62° | 77° | — | — |
| 2012 | 91° | 55° | 73° | — | — |
| 2011 | 88° | 56° | 72° | — | — |
| 2010 | 91° | 53° | 72° | — | — |
| 2009 | 94° | 56° | 75° | — | — |
| 2008 | 86° | 58° | 72° | — | — |
| 2007 | 86° | 57° | 72° | — | — |
| 2006 | 79° | 52° | 65° | — | — |
| 2005 | 90° | 57° | 73° | — | — |
| 2004 | 91° | 58° | 74° | — | — |
| 2003 | 98° | 59° | 79° | — | — |
| 2002 | 87° | 54° | 70° | — | — |
| 2001 | 98° | 60° | 79° | — | — |
| 2000 | 93° | 58° | 75° | — | — |
| 1999 | 93° | 56° | 74° | — | — |
| 1998 | 87° | 58° | 72° | — | — |
| 1997 | 77° | 59° | 68° | — | — |
| 1996 | 97° | 55° | 76° | — | — |
| 1995 | 84° | 54° | 69° | — | — |
| 1994 | 95° | 62° | 79° | — | — |
| 1993 | 93° | 53° | 73° | — | — |
| 1992 | 96° | 59° | 78° | — | — |
| 1991 | 79° | 55° | 67° | — | — |
| 1990 | 82° | 61° | 71° | — | — |
| 1989 | 77° | 55° | 66° | — | — |
| 1988 | 96° | 57° | 77° | — | — |
| 1987 | 89° | 57° | 73° | — | — |
| 1986 | 86° | 50° | 68° | — | — |
| 1985 | 80° | 50° | 65° | — | — |
| 1984 | 96° | 54° | 75° | — | — |
| 1983 | — | 59° | — | — | — |
| 1982 | 100° | 59° | 80° | — | — |
| 1981 | 98° | 54° | 76° | — | — |
| 1980 | 89° | 51° | 70° | — | — |
| 1979 | 86° | 57° | 72° | — | — |
| 1978 | 84° | 53° | 69° | — | — |
| 1977 | 90° | 55° | 72° | — | — |
| 1976 | 76° | 52° | 64° | — | — |
| 1975coldest | 75° | 54° | 64° | — | — |
| 1974 | 80° | 55° | 68° | — | — |
| 1973 | 90° | 56° | 73° | — | — |
| 1972 | 86° | 53° | 70° | — | — |
| 1971 | 90° | 57° | 73° | — | — |
55 years of data from FAIRFIELD