Weather on June 4
Ontario, CA
55 Years of Data
Avg High
83°F
Avg Low
56°F
Warmest
2006
83°F avg
Coldest
1999
56°F avg
About This Date
June 4th in Ontario, CA typically brings warm summer weather, with average highs around 83°F and lows near 56°F — a 27°F daily swing. Over 42 years of records, the warmest June 4th was in 2006 (83°F average), while the coldest was 1999 (56°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for June 4th in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 59° | 70° | — | — |
| 2024 | 84° | 56° | 70° | — | — |
| 2023 | 79° | 58° | 68° | — | — |
| 2022 | 78° | 60° | 69° | — | — |
| 2021 | 89° | 61° | 75° | — | — |
| 2020 | 88° | 64° | 76° | — | — |
| 2019 | 85° | 61° | 73° | — | — |
| 2018 | 89° | 59° | 74° | — | — |
| 2017 | 88° | 58° | 73° | — | — |
| 2016 | 97° | 63° | 80° | — | — |
| 2015 | 72° | 58° | 65° | — | — |
| 2014 | 91° | 58° | 74° | — | — |
| 2013 | 81° | 61° | 71° | — | — |
| 2012 | 79° | 61° | 70° | — | — |
| 2011 | 76° | 53° | 64° | — | — |
| 2010 | 86° | 58° | 72° | — | — |
| 2009 | 76° | 58° | 67° | — | — |
| 2008 | 66° | 56° | 61° | — | — |
| 2007 | 88° | 57° | 72° | — | — |
| 2006warmest | 99° | 67° | 83° | — | — |
| 2005 | 77° | 57° | 67° | — | — |
| 2004 | 93° | 59° | 76° | — | — |
| 2003 | 78° | 59° | 69° | — | — |
| 2002 | 90° | 55° | 72° | — | — |
| 2001 | 76° | 57° | 66° | — | — |
| 2000 | 91° | 57° | 74° | — | — |
| 1999coldest | 63° | 49° | 56° | — | — |
| 1998 | 72° | 56° | 64° | — | — |
| 1984 | 81° | 56° | 68° | — | — |
| 1983 | 76° | 48° | 62° | — | — |
| 1982 | 77° | 49° | 63° | — | — |
| 1981 | 104° | 58° | 81° | — | — |
| 1980 | 80° | 45° | 62° | — | — |
| 1979 | 78° | 54° | 66° | — | — |
| 1978 | 83° | 49° | 66° | — | — |
| 1977 | 93° | 52° | 72° | — | — |
| 1976 | 78° | 49° | 63° | — | — |
| 1975 | 72° | 52° | 62° | — | — |
| 1974 | 77° | 52° | 64° | — | — |
| 1973 | 82° | 51° | 67° | — | — |
| 1972 | 95° | 55° | 75° | — | — |
| 1971 | 79° | 44° | 61° | — | — |
42 years of data from ONTARIO INTL AP