Weather on August 11
Fontana, CA
55 Years of Data
Avg High
94°F
Avg Low
64°F
Warmest
2012
90°F avg
Coldest
1974
68°F avg
About This Date
August 11th in Fontana, CA typically brings hot summer weather, with average highs around 94°F and lows near 64°F — a 30°F daily swing. Over 54 years of records, the warmest August 11th was in 2012 (90°F average), while the coldest was 1974 (68°F) — a 22°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 11th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 69° | 81° | — | — |
| 2024 | 98° | 71° | 85° | — | — |
| 2023 | 86° | 66° | 76° | — | — |
| 2022 | 100° | 72° | 86° | — | — |
| 2021 | 100° | 74° | 87° | — | — |
| 2020 | 96° | 63° | 79° | — | — |
| 2019 | 90° | 62° | 76° | — | — |
| 2018 | 94° | 70° | 82° | — | — |
| 2017 | 97° | 67° | 82° | — | — |
| 2016 | 92° | 61° | 76° | — | — |
| 2015 | 89° | 61° | 75° | — | — |
| 2014 | 97° | 67° | 82° | — | — |
| 2013 | 89° | 58° | 73° | — | — |
| 2012warmest | 105° | 76° | 90° | — | — |
| 2011 | 84° | 62° | 73° | — | — |
| 2010 | 86° | 57° | 72° | — | — |
| 2009 | 93° | 61° | 77° | — | — |
| 2008 | 91° | 63° | 77° | — | — |
| 2007 | 92° | 61° | 76° | — | — |
| 2006 | 94° | 66° | 80° | — | — |
| 2005 | 90° | 63° | 76° | — | — |
| 2004 | 99° | 68° | 83° | — | — |
| 2003 | 101° | 70° | 85° | — | — |
| 2002 | 97° | 68° | 82° | — | — |
| 2001 | 93° | 63° | 78° | — | — |
| 2000 | 104° | 68° | 86° | — | — |
| 1999 | 83° | 57° | 70° | — | — |
| 1998 | 98° | 71° | 85° | — | — |
| 1997 | 85° | 64° | 74° | — | — |
| 1996 | 100° | 67° | 83° | — | — |
| 1995 | 103° | 64° | 83° | — | — |
| 1994 | 105° | 70° | 87° | — | — |
| 1993 | 93° | 59° | 76° | — | — |
| 1991 | 95° | 62° | 79° | — | — |
| 1990 | 101° | 69° | 85° | — | — |
| 1989 | 97° | 67° | 82° | — | — |
| 1988 | 88° | 60° | 74° | — | — |
| 1987 | 93° | 64° | 79° | — | — |
| 1986 | 98° | 60° | 79° | — | — |
| 1985 | 87° | 61° | 74° | — | — |
| 1984 | 95° | 63° | 79° | — | — |
| 1983 | 96° | 62° | 79° | — | — |
| 1982 | 95° | 57° | 76° | — | — |
| 1981 | 94° | 64° | 79° | — | — |
| 1980 | 102° | 68° | 85° | — | — |
| 1979 | 92° | 65° | 78° | — | — |
| 1978 | 93° | 63° | 78° | — | — |
| 1977 | 95° | 58° | 76° | — | — |
| 1976 | 94° | 62° | 78° | — | — |
| 1975 | 92° | 63° | 77° | — | — |
| 1974coldest | 84° | 51° | 68° | — | — |
| 1973 | 91° | 59° | 75° | — | — |
| 1972 | 98° | 69° | 84° | — | — |
| 1971 | 104° | 74° | 89° | — | — |
54 years of data from FONTANA KAISER