Weather on October 1
Rancho Cucamonga, CA
55 Years of Data
Avg High
87°F
Avg Low
59°F
Warmest
2008
87°F avg
Coldest
1971
58°F avg
About This Date
October 1st in Rancho Cucamonga, CA typically brings warm fall weather, with average highs around 87°F and lows near 59°F — a 28°F daily swing. Over 41 years of records, the warmest October 1st was in 2008 (87°F average), while the coldest was 1971 (58°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 2% of October 1st dates historically, with the wettest October 1st recording 3.99" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for October 1st in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 59° | 71° | — | — |
| 2024 | 102° | 64° | 83° | — | — |
| 2023 | 70° | 55° | 62° | — | — |
| 2022 | 81° | 62° | 71° | — | — |
| 2021 | 95° | 56° | 75° | — | — |
| 2020 | 106° | 69° | 87° | — | — |
| 2019 | 76° | 52° | 64° | — | — |
| 2018 | 93° | 66° | 80° | — | — |
| 2017 | 81° | 61° | 71° | — | — |
| 2016 | 89° | 65° | 77° | — | — |
| 2015 | 89° | 66° | 78° | — | — |
| 2014 | 89° | 61° | 75° | — | — |
| 2013 | 87° | 60° | 74° | — | — |
| 2012 | 107° | 67° | 87° | — | — |
| 2011 | 95° | 62° | 79° | — | — |
| 2010 | 91° | 67° | 79° | — | — |
| 2009 | 90° | 56° | 73° | — | — |
| 2008warmest | 101° | 74° | 87° | — | — |
| 2007 | 87° | 59° | 73° | — | — |
| 2006 | 80° | 62° | 71° | — | — |
| 2005 | 91° | 64° | 78° | — | — |
| 2004 | 81° | 58° | 69° | — | — |
| 2003 | 86° | 59° | 73° | — | — |
| 2002 | 67° | 55° | 61° | — | — |
| 2001 | 97° | 68° | 82° | — | — |
| 2000 | 85° | 57° | 71° | — | — |
| 1999 | 93° | 62° | 78° | — | — |
| 1998 | 78° | 55° | 67° | — | — |
| 1983 | 72° | 55° | 63° | 3.99" | — |
| 1982 | 81° | 45° | 63° | — | — |
| 1981 | 72° | 60° | 66° | — | — |
| 1980 | 108° | 61° | 84° | — | — |
| 1979 | 85° | 51° | 68° | — | — |
| 1978 | 87° | 59° | 73° | — | — |
| 1977 | 87° | 52° | 69° | — | — |
| 1976 | 75° | 53° | 64° | — | — |
| 1975 | 85° | 52° | 68° | — | — |
| 1974 | 88° | 55° | 71° | — | — |
| 1973 | 78° | 49° | 63° | — | — |
| 1972 | 90° | 55° | 72° | — | — |
| 1971coldest | 77° | 40° | 58° | — | — |
41 years of data from ONTARIO INTL AP