Weather on June 1
Ontario, CA
55 Years of Data
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 43 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 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 86° | 58° | 72° | — | — |
| 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° | — | — |
Ontario, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Ontario, CA Monthly Precipitation
Average rainfall per month, in inches.
Ontario, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Ontario, CA
Ontario, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.