Weather on November 21
Rancho Cucamonga, CA
55 Years of Data
Avg High
70°F
Avg Low
47°F
Warmest
2017
72°F avg
Coldest
1983
45°F avg
About This Date
November 21st in Rancho Cucamonga, CA typically brings pleasant fall weather, with average highs around 70°F and lows near 47°F. Over 41 years of records, the warmest November 21st was in 2017 (72°F average), while the coldest was 1983 (45°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 22% of November 21st dates historically, with the wettest November 21st recording 1.45" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for November 21st in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
2.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 52° | 58° | 1.45" | — |
| 2024 | 79° | 45° | 62° | — | — |
| 2023 | 82° | 49° | 65° | — | — |
| 2022 | 74° | 40° | 57° | — | — |
| 2021 | 83° | 55° | 69° | — | — |
| 2020 | 81° | 49° | 65° | — | — |
| 2019 | 64° | 51° | 58° | — | — |
| 2018 | 71° | 48° | 60° | — | — |
| 2017warmest | 90° | 54° | 72° | — | — |
| 2016 | 65° | 53° | 59° | 0.56" | — |
| 2015 | 87° | 55° | 71° | — | — |
| 2014 | 70° | 54° | 62° | 0.43" | — |
| 2013 | 62° | 54° | 58° | 0.61" | — |
| 2012 | 71° | 47° | 59° | — | — |
| 2011 | 59° | 42° | 51° | 0.03" | — |
| 2010 | 58° | 46° | 52° | 0.66" | — |
| 2009 | 65° | 50° | 57° | — | — |
| 2008 | 86° | 55° | 71° | — | — |
| 2007 | 71° | 49° | 60° | — | — |
| 2006 | 79° | 52° | 65° | — | — |
| 2005 | 83° | 47° | 65° | — | — |
| 2004 | 52° | 42° | 47° | 0.97" | — |
| 2003 | 58° | 51° | 54° | — | — |
| 2002 | 88° | 54° | 71° | — | — |
| 2001 | 72° | 50° | 61° | — | — |
| 2000 | 78° | 49° | 63° | — | — |
| 1999 | 66° | 47° | 56° | — | — |
| 1998 | 79° | 43° | 61° | — | — |
| 1983coldest | 56° | 34° | 45° | 1.02" | — |
| 1982 | 65° | 39° | 52° | — | — |
| 1981 | 74° | 42° | 58° | — | — |
| 1980 | 76° | 47° | 61° | — | — |
| 1979 | 64° | 35° | 50° | — | — |
| 1978 | 56° | 43° | 49° | 1.27" | — |
| 1977 | 65° | 40° | 52° | — | — |
| 1976 | 76° | 47° | 61° | — | — |
| 1975 | 68° | 37° | 53° | — | — |
| 1974 | 62° | 45° | 53° | — | — |
| 1973 | 57° | 44° | 51° | — | — |
| 1972 | 65° | 38° | 51° | — | — |
| 1971 | 62° | 36° | 49° | — | — |
41 years of data from ONTARIO INTL AP