Weather on May 23
Rancho Cucamonga, CA
55 Years of Data
Avg High
77°F
Avg Low
54°F
Warmest
2001
78°F avg
Coldest
2008
54°F avg
About This Date
May 23rd in Rancho Cucamonga, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 54°F. Over 41 years of records, the warmest May 23rd was in 2001 (78°F average), while the coldest was 2008 (54°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 10% of May 23rd dates historically. The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for May 23rd in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 59° | 71° | — | — |
| 2024 | 69° | 55° | 62° | — | — |
| 2023 | 70° | 58° | 64° | — | — |
| 2022 | 77° | 54° | 65° | — | — |
| 2021 | 79° | 51° | 65° | — | — |
| 2020 | 79° | 59° | 69° | — | — |
| 2019 | 62° | 55° | 59° | — | — |
| 2018 | 73° | 55° | 64° | — | — |
| 2017 | 94° | 62° | 78° | — | — |
| 2016 | 73° | 51° | 62° | — | — |
| 2015 | 66° | 55° | 61° | 0.03" | — |
| 2014 | 76° | 59° | 67° | 0.18" | — |
| 2013 | 76° | 59° | 67° | — | — |
| 2012 | 81° | 59° | 70° | — | — |
| 2011 | 69° | 56° | 62° | — | — |
| 2010 | 65° | 50° | 57° | — | — |
| 2009 | 81° | 55° | 68° | — | — |
| 2008coldest | 57° | 51° | 54° | 0.48" | — |
| 2007 | 82° | 56° | 69° | — | — |
| 2006 | 80° | 52° | 66° | — | — |
| 2005 | 86° | 60° | 73° | — | — |
| 2004 | 71° | 56° | 63° | — | — |
| 2003 | 82° | 55° | 69° | — | — |
| 2002 | 77° | 52° | 64° | — | — |
| 2001warmest | 97° | 60° | 78° | — | — |
| 2000 | 75° | 58° | 66° | — | — |
| 1999 | 74° | 53° | 63° | — | — |
| 1984 | 88° | 56° | 72° | — | — |
| 1983 | 88° | 51° | 69° | — | — |
| 1982 | 81° | 58° | 69° | — | — |
| 1981 | 80° | 54° | 67° | — | — |
| 1980 | 62° | 51° | 57° | — | — |
| 1979 | 87° | 58° | 72° | — | — |
| 1978 | 68° | 52° | 60° | — | — |
| 1977 | 71° | 50° | 61° | 0.3" | — |
| 1976 | 78° | 46° | 62° | — | — |
| 1975 | 78° | 44° | 61° | — | — |
| 1974 | 79° | 48° | 63° | — | — |
| 1973 | 78° | 44° | 61° | — | — |
| 1972 | 76° | 45° | 60° | — | — |
| 1971 | 74° | 42° | 58° | — | — |
41 years of data from ONTARIO INTL AP