Weather on September 2
Rancho Cucamonga, CA
55 Years of Data
Avg High
94°F
Avg Low
64°F
Warmest
2007
95°F avg
Coldest
1999
66°F avg
About This Date
September 2nd in Rancho Cucamonga, CA typically brings hot fall weather, with average highs around 94°F and lows near 64°F — a 30°F daily swing. Over 41 years of records, the warmest September 2nd was in 2007 (95°F average), while the coldest was 1999 (66°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 7% of September 2nd dates historically. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for September 2nd in Rancho Cucamonga, 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 | 102° | 71° | 87° | — | — |
| 2024 | 98° | 69° | 84° | — | — |
| 2023 | 79° | 69° | 74° | 0.13" | — |
| 2022 | 105° | 75° | 90° | — | — |
| 2021 | 86° | 65° | 75° | — | — |
| 2020 | 91° | 62° | 77° | — | — |
| 2019 | 99° | 72° | 85° | — | — |
| 2018 | 84° | 64° | 74° | — | — |
| 2017 | 105° | 78° | 92° | — | — |
| 2016 | 89° | 64° | 77° | — | — |
| 2015 | 87° | 64° | 76° | — | — |
| 2014 | 94° | 64° | 79° | — | — |
| 2013 | 96° | 72° | 84° | — | — |
| 2012 | 97° | 61° | 79° | — | — |
| 2011 | 91° | 60° | 76° | — | — |
| 2010 | 102° | 65° | 83° | — | — |
| 2009 | 102° | 72° | 87° | — | — |
| 2008 | 99° | 66° | 82° | — | — |
| 2007warmest | 110° | 80° | 95° | — | — |
| 2006 | 104° | 66° | 85° | — | — |
| 2005 | 91° | 61° | 76° | — | — |
| 2004 | 98° | 66° | 82° | — | — |
| 2003 | 96° | 64° | 80° | — | — |
| 2002 | 106° | 73° | 89° | — | — |
| 2001 | 93° | 68° | 81° | — | — |
| 2000 | 80° | 59° | 70° | — | — |
| 1999coldest | 77° | 56° | 66° | — | — |
| 1998 | 103° | 71° | 87° | 0.05" | — |
| 1983 | 100° | 66° | 83° | — | — |
| 1982 | 111° | 65° | 88° | — | — |
| 1981 | 91° | 56° | 73° | — | — |
| 1980 | 85° | 59° | 72° | — | — |
| 1979 | 92° | 53° | 72° | — | — |
| 1978 | 95° | 60° | 78° | — | — |
| 1977 | 89° | 58° | 73° | — | — |
| 1976 | 92° | 64° | 78° | — | — |
| 1975 | 91° | 51° | 71° | — | — |
| 1974 | 94° | 63° | 78° | — | — |
| 1973 | 88° | 48° | 68° | — | — |
| 1972 | 88° | 58° | 73° | 0.08" | — |
| 1971 | 84° | 57° | 71° | — | — |
41 years of data from ONTARIO INTL AP