Weather on August 23
Fontana, CA
55 Years of Data
Avg High
95°F
Avg Low
62°F
Warmest
1972
87°F avg
Coldest
1983
69°F avg
About This Date
August 23rd in Fontana, CA typically brings hot summer weather, with average highs around 95°F and lows near 62°F — a 33°F daily swing. Over 55 years of records, the warmest August 23rd was in 1972 (87°F average), while the coldest was 1983 (69°F) — a 18°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 23rd in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 102° | 72° | 87° | — | — |
| 2024 | 86° | 61° | 73° | — | — |
| 2023 | 95° | 63° | 79° | — | — |
| 2022 | 96° | 66° | 81° | — | — |
| 2021 | 87° | 63° | 75° | — | — |
| 2020 | 98° | 73° | 86° | — | — |
| 2019 | 91° | 61° | 76° | — | — |
| 2018 | 93° | 66° | 80° | — | — |
| 2017 | 87° | 64° | 76° | — | — |
| 2016 | 92° | 64° | 78° | — | — |
| 2015 | 96° | 64° | 80° | — | — |
| 2014 | 90° | 63° | 76° | — | — |
| 2013 | 100° | 68° | 84° | — | — |
| 2012 | 90° | 67° | 78° | — | — |
| 2011 | 97° | 66° | 81° | — | — |
| 2010 | 103° | 67° | 85° | — | — |
| 2009 | 93° | 64° | 79° | — | — |
| 2008 | 93° | 63° | 78° | — | — |
| 2007 | 90° | 64° | 77° | — | — |
| 2006 | 100° | 62° | 81° | — | — |
| 2005 | 91° | 60° | 76° | — | — |
| 2004 | 81° | 58° | 69° | — | — |
| 2003 | 95° | 61° | 78° | — | — |
| 2002 | 89° | 60° | 75° | — | — |
| 2001 | 87° | 59° | 73° | — | — |
| 2000 | 95° | 62° | 79° | — | — |
| 1999 | 101° | 63° | 82° | — | — |
| 1998 | 105° | 68° | 87° | — | — |
| 1997 | 102° | 67° | 84° | — | — |
| 1996 | 106° | 67° | 86° | — | — |
| 1995 | 98° | 66° | 82° | — | — |
| 1994 | 94° | 60° | 77° | — | — |
| 1993 | 96° | 59° | 78° | — | — |
| 1992 | 100° | 62° | 81° | — | — |
| 1991 | 105° | 68° | 87° | — | — |
| 1990 | 88° | 59° | 73° | — | — |
| 1989 | 83° | 58° | 70° | — | — |
| 1988 | 96° | 61° | 78° | — | — |
| 1987 | 93° | 56° | 74° | — | — |
| 1986 | 99° | 57° | 78° | — | — |
| 1985 | 104° | 56° | 80° | — | — |
| 1984 | 102° | 61° | 81° | — | — |
| 1983coldest | 85° | 54° | 69° | — | — |
| 1982 | 94° | 67° | 80° | — | — |
| 1981 | 95° | 60° | 78° | — | — |
| 1980 | 90° | 60° | 75° | — | — |
| 1979 | 100° | 58° | 79° | — | — |
| 1978 | 91° | 51° | 71° | — | — |
| 1977 | 87° | 60° | 74° | — | — |
| 1976 | 93° | 63° | 78° | — | — |
| 1975 | 97° | 62° | 79° | — | — |
| 1974 | 98° | 58° | 78° | — | — |
| 1973 | 90° | 60° | 75° | — | — |
| 1972warmest | 103° | 71° | 87° | — | — |
| 1971 | 95° | 63° | 79° | — | — |
55 years of data from FONTANA KAISER