Weather on October 9
Rancho Cucamonga, CA
55 Years of Data
Avg High
82°F
Avg Low
57°F
Warmest
2015
85°F avg
Coldest
2013
56°F avg
About This Date
October 9th in Rancho Cucamonga, CA typically brings warm fall weather, with average highs around 82°F and lows near 57°F — a 25°F daily swing. Over 41 years of records, the warmest October 9th was in 2015 (85°F average), while the coldest was 2013 (56°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 2% of October 9th dates historically. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for October 9th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 58° | 69° | — | — |
| 2024 | 92° | 63° | 77° | — | — |
| 2023 | 88° | 63° | 75° | — | — |
| 2022 | 86° | 62° | 74° | — | — |
| 2021 | 76° | 58° | 67° | — | — |
| 2020 | 78° | 63° | 70° | — | — |
| 2019 | 80° | 54° | 67° | — | — |
| 2018 | 79° | 57° | 68° | — | — |
| 2017 | 85° | 58° | 71° | — | — |
| 2016 | 95° | 58° | 76° | — | — |
| 2015warmest | 103° | 67° | 85° | — | — |
| 2014 | 82° | 64° | 73° | — | — |
| 2013coldest | 63° | 49° | 56° | 0.23" | — |
| 2012 | 78° | 58° | 68° | — | — |
| 2011 | 83° | 53° | 68° | — | — |
| 2010 | 91° | 55° | 73° | — | — |
| 2009 | 77° | 53° | 65° | — | — |
| 2008 | 90° | 62° | 76° | — | — |
| 2007 | 84° | 52° | 68° | — | — |
| 2006 | 70° | 59° | 64° | — | — |
| 2005 | 77° | 52° | 64° | — | — |
| 2004 | 84° | 56° | 70° | — | — |
| 2003 | 81° | 60° | 70° | — | — |
| 2002 | 88° | 59° | 73° | — | — |
| 2001 | 72° | 58° | 65° | — | — |
| 2000 | 74° | 56° | 65° | — | — |
| 1999 | 98° | 58° | 78° | — | — |
| 1998 | 83° | 52° | 67° | — | — |
| 1983 | 74° | 56° | 65° | — | — |
| 1982 | 81° | 70° | 75° | — | — |
| 1981 | 76° | 56° | 66° | — | — |
| 1980 | 89° | 57° | 73° | — | — |
| 1979 | 79° | 50° | 64° | — | — |
| 1978 | 90° | 59° | 74° | — | — |
| 1977 | 79° | 53° | 66° | — | — |
| 1976 | 92° | 58° | 75° | — | — |
| 1975 | 71° | 45° | 58° | — | — |
| 1974 | 72° | 49° | 60° | — | — |
| 1973 | 70° | 44° | 57° | — | — |
| 1972 | 68° | 54° | 61° | — | — |
| 1971 | 98° | 60° | 79° | — | — |
41 years of data from ONTARIO INTL AP