Weather on June 20
Fontana, CA
55 Years of Data
Avg High
90°F
Avg Low
60°F
Warmest
2016
93°F avg
Coldest
2003
60°F avg
About This Date
June 20th in Fontana, CA typically brings hot summer weather, with average highs around 90°F and lows near 60°F — a 30°F daily swing. Over 55 years of records, the warmest June 20th was in 2016 (93°F average), while the coldest was 2003 (60°F) — a 33°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 62° | 73° | — | — |
| 2024 | 86° | 59° | 73° | — | — |
| 2023 | 82° | 60° | 71° | — | — |
| 2022 | 100° | 59° | 80° | — | — |
| 2021 | 92° | 65° | 78° | — | — |
| 2020 | 82° | 61° | 71° | — | — |
| 2019 | 82° | 65° | 73° | — | — |
| 2018 | 90° | 60° | 75° | — | — |
| 2017 | 103° | 69° | 86° | — | — |
| 2016warmest | 112° | 74° | 93° | — | — |
| 2015 | 97° | 66° | 81° | — | — |
| 2014 | 94° | 62° | 78° | — | — |
| 2013 | 87° | 60° | 74° | — | — |
| 2012 | 88° | 58° | 73° | — | — |
| 2011 | 91° | 56° | 73° | — | — |
| 2010 | 84° | 55° | 70° | — | — |
| 2009 | 75° | 61° | 68° | — | — |
| 2008 | 108° | 70° | 89° | — | — |
| 2007 | 94° | 59° | 76° | — | — |
| 2006 | 91° | 60° | 76° | — | — |
| 2005 | 93° | 55° | 74° | — | — |
| 2004 | 83° | 57° | 70° | — | — |
| 2003coldest | 63° | 58° | 60° | — | — |
| 2002 | 82° | 63° | 72° | — | — |
| 2001 | 93° | 64° | 79° | — | — |
| 2000 | 90° | 58° | 74° | — | — |
| 1999 | 86° | 56° | 71° | — | — |
| 1998 | 81° | 58° | 69° | — | — |
| 1997 | 90° | 64° | 77° | — | — |
| 1996 | 87° | 60° | 74° | — | — |
| 1995 | 85° | 61° | 73° | — | — |
| 1994 | 94° | 57° | 75° | — | — |
| 1993 | 87° | 61° | 74° | — | — |
| 1992 | 89° | 56° | 72° | — | — |
| 1991 | 83° | 54° | 68° | — | — |
| 1990 | 96° | 60° | 78° | — | — |
| 1989 | 103° | 64° | 83° | — | — |
| 1988 | 82° | 59° | 71° | — | — |
| 1987 | 82° | 58° | 70° | — | — |
| 1986 | 91° | 56° | 73° | — | — |
| 1985 | 90° | 56° | 73° | — | — |
| 1984 | 90° | 54° | 72° | — | — |
| 1983 | 82° | 57° | 70° | — | — |
| 1982 | 77° | 55° | 66° | — | — |
| 1981 | 96° | 66° | 81° | — | — |
| 1980 | 89° | 50° | 70° | — | — |
| 1979 | 89° | 49° | 69° | — | — |
| 1978 | 97° | — | — | — | — |
| 1977 | 81° | 59° | 70° | — | — |
| 1976 | 87° | 60° | 74° | — | — |
| 1975 | 77° | 52° | 64° | — | — |
| 1974 | 97° | 56° | 76° | — | — |
| 1973 | 109° | 71° | 90° | — | — |
| 1972 | 97° | 63° | 80° | — | — |
| 1971 | 104° | 67° | 85° | — | — |
55 years of data from FONTANA KAISER