Weather on September 7
Ontario, CA
55 Years of Data
Avg High
93°F
Avg Low
64°F
Warmest
2022
91°F avg
Coldest
1978
66°F avg
About This Date
September 7th in Ontario, CA typically brings hot fall weather, with average highs around 93°F and lows near 64°F — a 29°F daily swing. Over 41 years of records, the warmest September 7th was in 2022 (91°F average), while the coldest was 1978 (66°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 7th dates historically. The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
Planning for September 7th in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 98° | 68° | 83° | — | — |
| 2024 | 106° | 77° | 91° | — | — |
| 2023 | 92° | 63° | 77° | — | — |
| 2022warmest | 105° | 77° | 91° | — | — |
| 2021 | 95° | 68° | 82° | — | — |
| 2020 | 94° | 72° | 83° | — | — |
| 2019 | 94° | 67° | 80° | — | — |
| 2018 | 98° | 63° | 80° | — | — |
| 2017 | 96° | 66° | 81° | — | — |
| 2016 | 88° | 63° | 75° | — | — |
| 2015 | 100° | 69° | 85° | — | — |
| 2014 | 101° | 72° | 86° | — | — |
| 2013 | 102° | 76° | 89° | — | — |
| 2012 | 92° | 69° | 80° | — | — |
| 2011 | 103° | 76° | 89° | — | — |
| 2010 | 72° | 60° | 66° | — | — |
| 2009 | 91° | 63° | 77° | — | — |
| 2008 | 96° | 66° | 81° | — | — |
| 2007 | 88° | 61° | 74° | — | — |
| 2006 | 93° | 64° | 79° | — | — |
| 2005 | 93° | 62° | 78° | — | — |
| 2004 | 102° | 65° | 83° | — | — |
| 2003 | 94° | 66° | 80° | — | — |
| 2002 | 84° | 60° | 72° | — | — |
| 2001 | 82° | 62° | 72° | — | — |
| 2000 | 96° | 63° | 79° | — | — |
| 1999 | 91° | 55° | 73° | — | — |
| 1998 | 91° | 65° | 78° | — | — |
| 1983 | 94° | 60° | 77° | — | — |
| 1982 | 98° | 60° | 79° | — | — |
| 1981 | 95° | 64° | 80° | — | — |
| 1980 | 89° | 58° | 73° | — | — |
| 1979 | 98° | 57° | 78° | — | — |
| 1978coldest | 76° | 57° | 66° | — | — |
| 1977 | 100° | 65° | 82° | — | — |
| 1976 | 92° | 61° | 76° | 0.25" | — |
| 1975 | 94° | 64° | 79° | — | — |
| 1974 | 94° | 60° | 77° | — | — |
| 1973 | 85° | 56° | 70° | — | — |
| 1972 | 81° | 63° | 72° | — | — |
| 1971 | 94° | 55° | 74° | — | — |
41 years of data from ONTARIO INTL AP