Weather on February 21
Rancho Cucamonga, CA
55 Years of Data
Avg High
66°F
Avg Low
45°F
Warmest
1981
67°F avg
Coldest
1971
47°F avg
About This Date
February 21st in Rancho Cucamonga, CA typically brings mild winter weather, with average highs around 66°F and lows near 45°F. Over 40 years of records, the warmest February 21st was in 1981 (67°F average), while the coldest was 1971 (47°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 25% of February 21st dates historically, with the wettest February 21st recording 4.83" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for February 21st in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 70° | 37° | 53° | — | — |
| 2025 | 79° | 55° | 67° | — | — |
| 2024 | 62° | 49° | 55° | 1.93" | — |
| 2023 | 65° | 44° | 54° | 0.1" | — |
| 2022 | 58° | 50° | 54° | — | — |
| 2021 | 73° | 44° | 59° | — | — |
| 2020 | 80° | 52° | 66° | — | — |
| 2019 | 56° | 39° | 47° | 0.1" | — |
| 2018 | 57° | 38° | 47° | — | — |
| 2017 | 67° | 54° | 60° | — | — |
| 2016 | 76° | 46° | 61° | — | — |
| 2015 | 68° | 51° | 60° | — | — |
| 2014 | 82° | 50° | 66° | — | — |
| 2013 | 60° | 41° | 51° | — | — |
| 2012 | 73° | 39° | 56° | — | — |
| 2011 | 59° | 38° | 48° | — | — |
| 2010 | 60° | 50° | 55° | 0.89" | — |
| 2009 | 71° | 44° | 58° | — | — |
| 2008 | 58° | 44° | 51° | 0.15" | — |
| 2007 | 69° | 46° | 58° | — | — |
| 2006 | 62° | 40° | 51° | — | — |
| 2005 | 57° | 50° | 54° | 4.52" | — |
| 2004 | 54° | 47° | 50° | 0.15" | — |
| 2003 | 73° | 44° | 59° | — | — |
| 2002 | 87° | 47° | 67° | — | — |
| 2001 | 64° | 46° | 55° | — | — |
| 2000 | 52° | 44° | 48° | 2.64" | — |
| 1999 | 64° | 43° | 53° | — | — |
| 1982 | 80° | 45° | 62° | — | — |
| 1981warmest | 75° | 59° | 67° | — | — |
| 1980 | 57° | 48° | 53° | 2.74" | — |
| 1979 | 53° | 43° | 48° | 4.83" | — |
| 1978 | 76° | 45° | 60° | — | — |
| 1977 | 68° | 45° | 56° | — | — |
| 1976 | 70° | 37° | 53° | — | — |
| 1975 | 59° | 40° | 49° | — | — |
| 1974 | 66° | 38° | 52° | — | — |
| 1973 | 68° | 49° | 58° | — | — |
| 1972 | 68° | 43° | 55° | — | — |
| 1971coldest | 61° | 33° | 47° | — | — |
40 years of data from ONTARIO INTL AP