Weather on June 3
Ontario, CA
55 Years of Data
Avg High
81°F
Avg Low
56°F
Warmest
2020
86°F avg
Coldest
1971
53°F avg
About This Date
June 3rd in Ontario, CA typically brings warm summer weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 42 years of records, the warmest June 3rd was in 2020 (86°F average), while the coldest was 1971 (53°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 7% of June 3rd dates historically. The last decade has been 7.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 7.3°F warmer on this date compared to 20-30 years ago.
Planning for June 3rd in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 60° | 70° | 0.25" | — |
| 2024 | 76° | 56° | 66° | — | — |
| 2023 | 81° | 53° | 67° | — | — |
| 2022 | 82° | 59° | 71° | — | — |
| 2021 | 93° | 62° | 78° | — | — |
| 2020warmest | 102° | 69° | 86° | — | — |
| 2019 | 81° | 59° | 70° | — | — |
| 2018 | 93° | 59° | 76° | — | — |
| 2017 | 92° | 59° | 75° | — | — |
| 2016 | 102° | 62° | 82° | — | — |
| 2015 | 77° | 59° | 68° | — | — |
| 2014 | 92° | 56° | 74° | — | — |
| 2013 | 83° | 61° | 72° | — | — |
| 2012 | 84° | 60° | 72° | — | — |
| 2011 | 80° | 53° | 67° | — | — |
| 2010 | 83° | 56° | 69° | — | — |
| 2009 | 78° | 58° | 68° | 0.03" | — |
| 2008 | 78° | 54° | 66° | — | — |
| 2007 | 82° | 58° | 70° | — | — |
| 2006 | 101° | 66° | 83° | — | — |
| 2005 | 79° | 59° | 69° | 0.03" | — |
| 2004 | 88° | 61° | 74° | — | — |
| 2003 | 75° | 60° | 68° | — | — |
| 2002 | 73° | 58° | 65° | — | — |
| 2001 | 71° | 58° | 64° | — | — |
| 2000 | 90° | 58° | 74° | — | — |
| 1999 | 65° | 50° | 57° | — | — |
| 1998 | 72° | 55° | 63° | — | — |
| 1984 | 82° | 56° | 69° | — | — |
| 1983 | 72° | 45° | 58° | — | — |
| 1982 | 78° | 53° | 66° | — | — |
| 1981 | 89° | 53° | 71° | — | — |
| 1980 | 72° | 52° | 62° | — | — |
| 1979 | 84° | 56° | 70° | — | — |
| 1978 | 82° | 46° | 64° | — | — |
| 1977 | 88° | 52° | 70° | — | — |
| 1976 | 75° | 56° | 65° | — | — |
| 1975 | 75° | 52° | 63° | — | — |
| 1974 | 73° | 49° | 61° | — | — |
| 1973 | 67° | 52° | 59° | — | — |
| 1972 | 85° | 60° | 72° | — | — |
| 1971coldest | 65° | 41° | 53° | — | — |
42 years of data from ONTARIO INTL AP