Weather on June 1
Ontario, CA
55 Years of Data
Avg High
82°F
Avg Low
56°F
Warmest
2013
80°F avg
Coldest
1971
54°F avg
About This Date
June 1st in Ontario, CA typically brings warm summer weather, with average highs around 82°F and lows near 56°F — a 26°F daily swing. Over 42 years of records, the warmest June 1st was in 2013 (80°F average), while the coldest was 1971 (54°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 2% of June 1st dates historically. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for June 1st in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 64° | 77° | — | — |
| 2024 | 78° | 58° | 68° | — | — |
| 2023 | 65° | 57° | 61° | — | — |
| 2022 | 93° | 58° | 75° | — | — |
| 2021 | 94° | 60° | 77° | — | — |
| 2020 | 89° | 62° | 76° | — | — |
| 2019 | 75° | 62° | 69° | — | — |
| 2018 | 83° | 54° | 68° | — | — |
| 2017 | 79° | 60° | 69° | — | — |
| 2016 | 83° | 59° | 71° | — | — |
| 2015 | 84° | 58° | 71° | — | — |
| 2014 | 91° | 59° | 75° | — | — |
| 2013warmest | 100° | 61° | 80° | — | — |
| 2012 | 92° | 60° | 76° | — | — |
| 2011 | 73° | 51° | 62° | — | — |
| 2010 | 76° | 55° | 65° | — | — |
| 2009 | 78° | 60° | 69° | — | — |
| 2008 | 83° | 54° | 68° | — | — |
| 2007 | 80° | 54° | 67° | — | — |
| 2006 | 90° | 62° | 76° | — | — |
| 2005 | 78° | 58° | 68° | — | — |
| 2004 | 91° | 60° | 76° | — | — |
| 2003 | 87° | 59° | 73° | — | — |
| 2002 | 83° | 57° | 70° | — | — |
| 2001 | 82° | 59° | 71° | — | — |
| 2000 | 90° | 56° | 73° | — | — |
| 1999 | 73° | 52° | 62° | 0.03" | — |
| 1998 | 82° | 52° | 67° | — | — |
| 1984 | 91° | 57° | 74° | — | — |
| 1983 | 68° | 56° | 62° | — | — |
| 1982 | 73° | 49° | 61° | — | — |
| 1981 | 84° | 61° | 72° | — | — |
| 1980 | 63° | 52° | 57° | — | — |
| 1979 | 80° | 49° | 64° | — | — |
| 1978 | 74° | 56° | 65° | — | — |
| 1977 | 87° | 54° | 70° | — | — |
| 1976 | 86° | 49° | 67° | — | — |
| 1975 | 80° | 47° | 63° | — | — |
| 1974 | 77° | 49° | 63° | — | — |
| 1973 | 65° | 55° | 60° | — | — |
| 1972 | 94° | 58° | 76° | — | — |
| 1971coldest | 70° | 39° | 54° | — | — |
42 years of data from ONTARIO INTL AP