Weather on May 26
Ontario, CA
55 Years of Data
Avg High
78°F
Avg Low
54°F
Warmest
2020
79°F avg
Coldest
1980
56°F avg
About This Date
May 26th in Ontario, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 54°F. Over 42 years of records, the warmest May 26th was in 2020 (79°F average), while the coldest was 1980 (56°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 26th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 26th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 57° | 68° | — | — |
| 2024 | 74° | 54° | 64° | — | — |
| 2023 | 68° | 56° | 62° | — | — |
| 2022 | 86° | 56° | 71° | — | — |
| 2021 | 87° | 58° | 72° | — | — |
| 2020warmest | 95° | 63° | 79° | — | — |
| 2019 | 63° | 54° | 58° | 0.18" | — |
| 2018 | 67° | 54° | 60° | — | — |
| 2017 | 74° | 57° | 65° | — | — |
| 2016 | 76° | 51° | 63° | — | — |
| 2015 | 77° | 58° | 67° | — | — |
| 2014 | 91° | 59° | 75° | — | — |
| 2013 | 77° | 55° | 66° | — | — |
| 2012 | 67° | 49° | 58° | — | — |
| 2011 | 76° | 52° | 64° | — | — |
| 2010 | 74° | 50° | 62° | — | — |
| 2009 | 79° | 57° | 68° | — | — |
| 2008 | 64° | 50° | 57° | — | — |
| 2007 | 84° | 56° | 70° | — | — |
| 2006 | 70° | 59° | 64° | — | — |
| 2005 | 86° | 56° | 71° | — | — |
| 2004 | 73° | 56° | 64° | — | — |
| 2003 | 82° | 54° | 68° | — | — |
| 2002 | 75° | 56° | 65° | — | — |
| 2001 | 74° | 60° | 67° | — | — |
| 2000 | 81° | 58° | 69° | — | — |
| 1999 | 84° | 54° | 69° | — | — |
| 1998 | 66° | 52° | 59° | — | — |
| 1984 | 97° | 54° | 75° | — | — |
| 1983 | 88° | 58° | 73° | — | — |
| 1982 | 76° | 58° | 67° | — | — |
| 1981 | 79° | 60° | 69° | — | — |
| 1980coldest | 70° | 42° | 56° | — | — |
| 1979 | 77° | 52° | 64° | — | — |
| 1978 | 73° | 44° | 59° | — | — |
| 1977 | 70° | 44° | 57° | — | — |
| 1976 | 85° | 48° | 66° | — | — |
| 1975 | 81° | 50° | 65° | — | — |
| 1974 | 94° | 60° | 77° | — | — |
| 1973 | 76° | 51° | 63° | — | — |
| 1972 | 79° | 44° | 61° | — | — |
| 1971 | 76° | 49° | 62° | — | — |
42 years of data from ONTARIO INTL AP