Weather on May 22
Ontario, CA
55 Years of Data
Avg High
77°F
Avg Low
53°F
Warmest
2005
78°F avg
Coldest
1971
55°F avg
About This Date
May 22nd in Ontario, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 53°F. Over 42 years of records, the warmest May 22nd was in 2005 (78°F average), while the coldest was 1971 (55°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 22nd dates historically, with the wettest May 22nd recording 1.09" of rain. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for May 22nd in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 61° | 75° | — | — |
| 2024 | 75° | 53° | 64° | — | — |
| 2023 | 80° | 60° | 70° | — | — |
| 2022 | 80° | 57° | 69° | — | — |
| 2021 | 72° | 50° | 61° | — | — |
| 2020 | 82° | 58° | 70° | — | — |
| 2019 | 68° | 54° | 61° | 0.48" | — |
| 2018 | 70° | 53° | 61° | — | — |
| 2017 | 94° | 62° | 78° | — | — |
| 2016 | 74° | 49° | 61° | — | — |
| 2015 | 63° | 54° | 58° | — | — |
| 2014 | 71° | 55° | 63° | — | — |
| 2013 | 80° | 61° | 70° | — | — |
| 2012 | 89° | 60° | 75° | — | — |
| 2011 | 71° | 54° | 62° | — | — |
| 2010 | 69° | 51° | 60° | — | — |
| 2009 | 80° | 56° | 68° | — | — |
| 2008 | 69° | 54° | 61° | 0.38" | — |
| 2007 | 73° | 56° | 64° | — | — |
| 2006 | 68° | 55° | 62° | 1.09" | — |
| 2005warmest | 96° | 61° | 78° | — | — |
| 2004 | 73° | 56° | 64° | — | — |
| 2003 | 92° | 60° | 76° | — | — |
| 2002 | 78° | 48° | 63° | — | — |
| 2001 | 93° | 58° | 75° | — | — |
| 2000 | 88° | 59° | 73° | — | — |
| 1999 | 66° | 52° | 59° | — | — |
| 1998 | 73° | 48° | 61° | — | — |
| 1984 | 95° | 54° | 74° | — | — |
| 1983 | 85° | 53° | 69° | — | — |
| 1982 | 74° | 57° | 65° | — | — |
| 1981 | 78° | 48° | 63° | — | — |
| 1980 | 60° | 50° | 55° | — | — |
| 1979 | 88° | 49° | 68° | — | — |
| 1978 | 73° | 48° | 61° | — | — |
| 1977 | 76° | 48° | 62° | — | — |
| 1976 | 74° | 45° | 59° | — | — |
| 1975 | 70° | 40° | 55° | — | — |
| 1974 | 85° | 46° | 65° | — | — |
| 1973 | 76° | 45° | 60° | — | — |
| 1972 | 78° | 42° | 60° | — | — |
| 1971coldest | 65° | 46° | 55° | — | — |
42 years of data from ONTARIO INTL AP