Weather on June 12
Ontario, CA
55 Years of Data
Avg High
83°F
Avg Low
57°F
Warmest
1979
85°F avg
Coldest
1977
62°F avg
About This Date
June 12th in Ontario, CA typically brings warm summer weather, with average highs around 83°F and lows near 57°F — a 26°F daily swing. Over 42 years of records, the warmest June 12th was in 1979 (85°F average), while the coldest was 1977 (62°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 2% of June 12th dates historically. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for June 12th in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 61° | 74° | — | — |
| 2024 | 90° | 60° | 75° | — | — |
| 2023 | 68° | 58° | 63° | — | — |
| 2022 | 89° | 62° | 76° | — | — |
| 2021 | 96° | 62° | 79° | — | — |
| 2020 | 88° | 60° | 74° | — | — |
| 2019 | 97° | 67° | 82° | — | — |
| 2018 | 94° | 66° | 80° | — | — |
| 2017 | 77° | 56° | 66° | — | — |
| 2016 | 76° | 60° | 68° | — | — |
| 2015 | 80° | 63° | 71° | — | — |
| 2014 | 89° | 60° | 75° | — | — |
| 2013 | 81° | 62° | 71° | — | — |
| 2012 | 89° | 57° | 73° | — | — |
| 2011 | 75° | 56° | 65° | — | — |
| 2010 | 73° | 58° | 65° | — | — |
| 2009 | 70° | 59° | 64° | — | — |
| 2008 | 88° | 60° | 74° | — | — |
| 2007 | 92° | 63° | 77° | — | — |
| 2006 | 81° | 58° | 69° | — | — |
| 2005 | 80° | 60° | 70° | — | — |
| 2004 | 85° | 57° | 71° | — | — |
| 2003 | 73° | 55° | 64° | — | — |
| 2002 | 86° | 55° | 71° | — | — |
| 2001 | 69° | 60° | 65° | — | — |
| 2000 | 91° | 58° | 74° | — | — |
| 1999 | 84° | 54° | 69° | — | — |
| 1998 | 68° | 56° | 62° | 0.03" | — |
| 1984 | 81° | 56° | 68° | — | — |
| 1983 | 73° | 56° | 64° | — | — |
| 1982 | 76° | 53° | 64° | — | — |
| 1981 | 83° | 59° | 71° | — | — |
| 1980 | 86° | 48° | 67° | — | — |
| 1979warmest | 105° | 65° | 85° | — | — |
| 1978 | 93° | 56° | 74° | — | — |
| 1977coldest | 77° | 47° | 62° | — | — |
| 1976 | 83° | 48° | 65° | — | — |
| 1975 | 89° | 55° | 72° | — | — |
| 1974 | 86° | 51° | 69° | — | — |
| 1973 | 81° | 48° | 64° | — | — |
| 1972 | 88° | 55° | 71° | — | — |
| 1971 | 85° | 50° | 67° | — | — |
42 years of data from ONTARIO INTL AP