Weather on September 8
Fontana, CA
55 Years of Data
Avg High
93°F
Avg Low
64°F
Warmest
2024
95°F avg
Coldest
2010
64°F avg
About This Date
September 8th in Fontana, CA typically brings hot fall weather, with average highs around 93°F and lows near 64°F — a 29°F daily swing. Over 55 years of records, the warmest September 8th was in 2024 (95°F average), while the coldest was 2010 (64°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 8th dates historically. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for September 8th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 67° | 80° | — | — |
| 2024warmest | 109° | 80° | 95° | — | — |
| 2023 | 98° | 69° | 84° | — | — |
| 2022 | 100° | 80° | 90° | 0.03" | — |
| 2021 | 97° | 70° | 83° | — | — |
| 2020 | 83° | 69° | 76° | — | — |
| 2019 | 84° | 62° | 73° | — | — |
| 2018 | 102° | 65° | 83° | — | — |
| 2017 | 92° | 67° | 79° | — | — |
| 2016 | 87° | 63° | 75° | — | — |
| 2015 | 106° | 75° | 90° | — | — |
| 2014 | 86° | 72° | 79° | 0.25" | — |
| 2013 | 96° | 71° | 84° | — | — |
| 2012 | 97° | 70° | 83° | — | — |
| 2011 | 100° | 69° | 85° | — | — |
| 2010coldest | 70° | 59° | 64° | — | — |
| 2009 | 89° | 61° | 75° | — | — |
| 2008 | 91° | 63° | 77° | — | — |
| 2007 | 88° | 61° | 74° | — | — |
| 2006 | 87° | 62° | 75° | — | — |
| 2005 | 87° | 58° | 72° | — | — |
| 2004 | 101° | 67° | 84° | — | — |
| 2003 | 88° | 63° | 75° | — | — |
| 2002 | 88° | 55° | 71° | — | — |
| 2001 | 80° | 59° | 70° | — | — |
| 2000 | 91° | 61° | 76° | — | — |
| 1999 | 91° | 58° | 74° | — | — |
| 1998 | 89° | 64° | 77° | — | — |
| 1997 | 99° | 65° | 82° | — | — |
| 1996 | 98° | 66° | 82° | — | — |
| 1995 | 100° | 66° | 83° | — | — |
| 1994 | 98° | 60° | 79° | — | — |
| 1993 | 104° | 62° | 83° | — | — |
| 1992 | 90° | 56° | 73° | — | — |
| 1991 | 88° | 57° | 72° | — | — |
| 1990 | 102° | 66° | 84° | — | — |
| 1989 | 88° | 54° | 71° | — | — |
| 1988 | 93° | 64° | 79° | — | — |
| 1987 | 100° | 59° | 80° | — | — |
| 1986 | 91° | 57° | 74° | — | — |
| 1985 | 83° | 59° | 71° | — | — |
| 1984 | 104° | 67° | 85° | — | — |
| 1983 | 95° | 61° | 78° | — | — |
| 1982 | 93° | 66° | 80° | — | — |
| 1981 | 98° | 65° | 81° | — | — |
| 1980 | 77° | 55° | 66° | — | — |
| 1979 | 109° | 65° | 87° | — | — |
| 1978 | 85° | 51° | 68° | — | — |
| 1977 | 102° | 69° | 86° | — | — |
| 1976 | 100° | 62° | 81° | — | — |
| 1975 | 84° | 65° | 74° | — | — |
| 1974 | 94° | 67° | 80° | — | — |
| 1973 | 84° | 60° | 72° | — | — |
| 1972 | 87° | 68° | 78° | — | — |
| 1971 | 108° | 75° | 91° | — | — |
55 years of data from FONTANA KAISER