Weather on September 22
Rancho Cucamonga, CA
55 Years of Data
Avg High
88°F
Avg Low
60°F
Warmest
2021
87°F avg
Coldest
2007
62°F avg
About This Date
September 22nd in Rancho Cucamonga, CA typically brings warm fall weather, with average highs around 88°F and lows near 60°F — a 28°F daily swing. Over 41 years of records, the warmest September 22nd was in 2021 (87°F average), while the coldest was 2007 (62°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 22nd dates historically. 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 September 22nd in Rancho Cucamonga, 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 | 92° | 67° | 79° | — | — |
| 2024 | 89° | 58° | 73° | — | — |
| 2023 | 77° | 58° | 67° | — | — |
| 2022 | 93° | 60° | 77° | — | — |
| 2021warmest | 102° | 72° | 87° | — | — |
| 2020 | 94° | 63° | 78° | — | — |
| 2019 | 96° | 65° | 80° | — | — |
| 2018 | 97° | 63° | 80° | — | — |
| 2017 | 75° | 54° | 64° | — | — |
| 2016 | 79° | 58° | 68° | — | — |
| 2015 | 88° | 68° | 78° | — | — |
| 2014 | 91° | 62° | 77° | — | — |
| 2013 | 80° | 57° | 69° | — | — |
| 2012 | 99° | 69° | 84° | — | — |
| 2011 | 100° | 60° | 80° | — | — |
| 2010 | 68° | 58° | 63° | — | — |
| 2009 | 105° | 61° | 83° | — | — |
| 2008 | 84° | 57° | 71° | — | — |
| 2007coldest | 67° | 57° | 62° | 0.43" | — |
| 2006 | 75° | 59° | 67° | — | — |
| 2005 | 90° | 58° | 74° | — | — |
| 2004 | 92° | 59° | 75° | — | — |
| 2003 | 103° | 62° | 82° | — | — |
| 2002 | 104° | 64° | 84° | — | — |
| 2001 | 93° | 59° | 76° | — | — |
| 2000 | 70° | 60° | 65° | 0.33" | — |
| 1999 | 91° | 68° | 80° | — | — |
| 1998 | 74° | 62° | 68° | — | — |
| 1983 | 85° | 68° | 76° | — | — |
| 1982 | 102° | 58° | 80° | — | — |
| 1981 | 90° | 55° | 72° | — | — |
| 1980 | 81° | 51° | 66° | — | — |
| 1979 | 94° | 58° | 76° | — | — |
| 1978 | 101° | 56° | 78° | — | — |
| 1977 | 80° | 48° | 64° | — | — |
| 1976 | 75° | 56° | 65° | — | — |
| 1975 | 100° | 62° | 81° | — | — |
| 1974 | 99° | 68° | 83° | — | — |
| 1973 | 76° | 55° | 65° | — | — |
| 1972 | 90° | 61° | 75° | — | — |
| 1971 | 83° | 54° | 68° | — | — |
41 years of data from ONTARIO INTL AP