Weather on September 10
Rancho Cucamonga, CA
55 Years of Data
Avg High
89°F
Avg Low
63°F
Warmest
2015
89°F avg
Coldest
1973
64°F avg
About This Date
September 10th in Rancho Cucamonga, CA typically brings warm fall weather, with average highs around 89°F and lows near 63°F — a 26°F daily swing. Over 41 years of records, the warmest September 10th was in 2015 (89°F average), while the coldest was 1973 (64°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 10th dates historically, with the wettest September 10th recording 3.35" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for September 10th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 64° | 73° | — | — |
| 2024 | 100° | 70° | 85° | — | — |
| 2023 | 96° | 71° | 84° | 0.08" | — |
| 2022 | 80° | 70° | 75° | — | — |
| 2021 | 100° | 75° | 88° | — | — |
| 2020 | 91° | 61° | 76° | — | — |
| 2019 | 81° | 64° | 72° | — | — |
| 2018 | 94° | 63° | 78° | — | — |
| 2017 | 100° | 68° | 84° | — | — |
| 2016 | 94° | 63° | 78° | — | — |
| 2015warmest | 100° | 77° | 89° | — | — |
| 2014 | 99° | 66° | 82° | — | — |
| 2013 | 89° | 61° | 75° | — | — |
| 2012 | 93° | 72° | 82° | — | — |
| 2011 | 76° | 61° | 68° | — | — |
| 2010 | 85° | 56° | 70° | — | — |
| 2009 | 100° | 66° | 83° | — | — |
| 2008 | 86° | 55° | 71° | — | — |
| 2007 | 92° | 60° | 76° | — | — |
| 2006 | 90° | 56° | 73° | — | — |
| 2005 | 76° | 58° | 67° | — | — |
| 2004 | 99° | 71° | 85° | — | — |
| 2003 | 83° | 60° | 71° | — | — |
| 2002 | 96° | 64° | 80° | — | — |
| 2001 | 82° | 58° | 70° | — | — |
| 2000 | 91° | 56° | 73° | — | — |
| 1999 | 90° | 61° | 75° | — | — |
| 1998 | 87° | 63° | 75° | — | — |
| 1983 | 103° | 73° | 88° | — | — |
| 1982 | 86° | 65° | 75° | — | — |
| 1981 | 92° | 60° | 76° | — | — |
| 1980 | 80° | 58° | 69° | — | — |
| 1979 | 103° | 67° | 85° | — | — |
| 1978 | 79° | 51° | 65° | — | — |
| 1977 | 89° | 61° | 75° | — | — |
| 1976 | 81° | 66° | 73° | 3.35" | — |
| 1975 | 73° | 59° | 66° | — | — |
| 1974 | 92° | 59° | 75° | — | — |
| 1973coldest | 72° | 57° | 64° | — | — |
| 1972 | 76° | 62° | 69° | — | — |
| 1971 | 99° | 66° | 82° | — | — |
41 years of data from ONTARIO INTL AP