Weather on August 9
Fontana, CA
55 Years of Data
Avg High
95°F
Avg Low
64°F
Warmest
1971
94°F avg
Coldest
1974
70°F avg
About This Date
August 9th in Fontana, CA typically brings hot summer weather, with average highs around 95°F and lows near 64°F — a 31°F daily swing. Over 55 years of records, the warmest August 9th was in 1971 (94°F average), while the coldest was 1974 (70°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 August 9th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 65° | 80° | — | — |
| 2024 | 97° | 65° | 81° | — | — |
| 2023 | 90° | 67° | 78° | — | — |
| 2022 | 99° | 74° | 86° | — | — |
| 2021 | 97° | 65° | 81° | — | — |
| 2020 | 94° | 64° | 79° | — | — |
| 2019 | 93° | 64° | 79° | — | — |
| 2018 | 103° | 71° | 87° | — | — |
| 2017 | 95° | 65° | 80° | — | — |
| 2016 | 90° | 64° | 77° | — | — |
| 2015 | 86° | 60° | 73° | — | — |
| 2014 | 92° | 63° | 77° | — | — |
| 2013 | 86° | 58° | 72° | — | — |
| 2012 | 104° | 74° | 89° | — | — |
| 2011 | 87° | 58° | 72° | — | — |
| 2010 | 86° | 56° | 71° | — | — |
| 2009 | 89° | 62° | 76° | — | — |
| 2008 | 91° | 66° | 79° | — | — |
| 2007 | 91° | 62° | 77° | — | — |
| 2006 | 101° | 66° | 83° | — | — |
| 2005 | 95° | 66° | 81° | — | — |
| 2004 | 100° | 67° | 83° | — | — |
| 2003 | 102° | 69° | 86° | — | — |
| 2002 | 103° | 66° | 84° | — | — |
| 2001 | 93° | 62° | 78° | — | — |
| 2000 | 95° | 65° | 80° | — | — |
| 1999 | 84° | 57° | 71° | — | — |
| 1998 | 101° | 66° | 83° | — | — |
| 1997 | 82° | 66° | 74° | — | — |
| 1996 | 102° | 63° | 82° | — | — |
| 1995 | 100° | 67° | 83° | — | — |
| 1994 | 102° | 70° | 86° | — | — |
| 1993 | 95° | 67° | 81° | — | — |
| 1992 | 104° | 65° | 84° | — | — |
| 1991 | 100° | 62° | 81° | — | — |
| 1990 | 97° | 66° | 81° | — | — |
| 1989 | 94° | 66° | 80° | — | — |
| 1988 | 90° | 61° | 75° | — | — |
| 1987 | 97° | 62° | 79° | — | — |
| 1986 | 95° | 61° | 78° | — | — |
| 1985 | 93° | 61° | 77° | — | — |
| 1984 | 99° | 60° | 79° | — | — |
| 1983 | 90° | 71° | 80° | — | — |
| 1982 | 99° | 61° | 80° | — | — |
| 1981 | 99° | 63° | 81° | — | — |
| 1980 | 104° | 64° | 84° | — | — |
| 1979 | 99° | 61° | 80° | — | — |
| 1978 | 93° | 65° | 79° | — | — |
| 1977 | 93° | 56° | 74° | — | — |
| 1976 | 91° | 52° | 71° | — | — |
| 1975 | 96° | 66° | 81° | — | — |
| 1974coldest | 81° | 60° | 70° | — | — |
| 1973 | 92° | 60° | 76° | — | — |
| 1972 | 96° | 67° | 81° | — | — |
| 1971warmest | 109° | 78° | 94° | — | — |
55 years of data from FONTANA KAISER