Weather on May 2
Ontario, CA
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
2004
80°F avg
Coldest
1982
49°F avg
About This Date
May 2nd in Ontario, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 52°F — a 25°F daily swing. Over 41 years of records, the warmest May 2nd was in 2004 (80°F average), while the coldest was 1982 (49°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 2nd dates historically, with the wettest May 2nd recording 0.58" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for May 2nd in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 56° | 65° | — | — |
| 2024 | 76° | 52° | 64° | — | — |
| 2023 | 66° | 50° | 58° | — | — |
| 2022 | 77° | 56° | 66° | — | — |
| 2021 | 70° | 57° | 63° | — | — |
| 2020 | 83° | 58° | 70° | — | — |
| 2019 | 82° | 55° | 69° | — | — |
| 2018 | 61° | 49° | 55° | 0.1" | — |
| 2017 | 92° | 60° | 76° | — | — |
| 2016 | 87° | 53° | 70° | — | — |
| 2015 | 90° | 57° | 73° | — | — |
| 2014 | 98° | 60° | 79° | — | — |
| 2013 | 93° | 54° | 73° | — | — |
| 2012 | 63° | 54° | 58° | — | — |
| 2011 | 88° | 50° | 69° | — | — |
| 2010 | 74° | 51° | 62° | — | — |
| 2009 | 66° | 58° | 62° | — | — |
| 2008 | 86° | 54° | 70° | — | — |
| 2007 | 75° | 57° | 66° | — | — |
| 2006 | 76° | 58° | 67° | — | — |
| 2005 | 73° | 56° | 64° | — | — |
| 2004warmest | 101° | 59° | 80° | — | — |
| 2003 | 68° | 50° | 59° | 0.15" | — |
| 2002 | 68° | 52° | 60° | — | — |
| 2001 | 66° | 53° | 60° | — | — |
| 2000 | 85° | 55° | 70° | — | — |
| 1999 | 65° | 46° | 55° | — | — |
| 1984 | 76° | 51° | 63° | — | — |
| 1983 | 61° | 47° | 54° | — | — |
| 1982coldest | 55° | 42° | 49° | — | — |
| 1981 | 79° | 55° | 67° | — | — |
| 1980 | 82° | 45° | 63° | — | — |
| 1979 | 61° | 50° | 55° | 0.58" | — |
| 1978 | 73° | 43° | 58° | — | — |
| 1977 | 77° | 43° | 60° | — | — |
| 1976 | 85° | 50° | 67° | — | — |
| 1975 | 79° | 43° | 61° | — | — |
| 1974 | 74° | 46° | 60° | — | — |
| 1973 | 85° | 46° | 65° | — | — |
| 1972 | 84° | 48° | 66° | — | — |
| 1971 | 70° | 40° | 55° | — | — |
41 years of data from ONTARIO INTL AP