Weather on June 18
Fontana, CA
55 Years of Data
Avg High
88°F
Avg Low
59°F
Warmest
1981
85°F avg
Coldest
1975
58°F avg
About This Date
June 18th in Fontana, CA typically brings warm summer weather, with average highs around 88°F and lows near 59°F — a 29°F daily swing. Over 55 years of records, the warmest June 18th was in 1981 (85°F average), while the coldest was 1975 (58°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for June 18th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 65° | 80° | — | — |
| 2024 | 83° | 60° | 71° | — | — |
| 2023 | 81° | 59° | 70° | — | — |
| 2022 | 80° | 59° | 70° | — | — |
| 2021 | 94° | 68° | 81° | — | — |
| 2020 | 77° | 59° | 68° | — | — |
| 2019 | 82° | 64° | 73° | — | — |
| 2018 | 79° | 58° | 68° | — | — |
| 2017 | 97° | 65° | 81° | — | — |
| 2016 | 99° | 60° | 79° | — | — |
| 2015 | 98° | 62° | 80° | — | — |
| 2014 | 84° | 57° | 71° | — | — |
| 2013 | 88° | 61° | 74° | — | — |
| 2012 | 88° | 58° | 73° | — | — |
| 2011 | 81° | 59° | 70° | — | — |
| 2010 | 82° | 57° | 70° | — | — |
| 2009 | 87° | 58° | 72° | — | — |
| 2008 | 103° | 65° | 84° | — | — |
| 2007 | 89° | 58° | 73° | — | — |
| 2006 | 90° | 64° | 77° | — | — |
| 2005 | 79° | 56° | 67° | — | — |
| 2004 | 82° | 58° | 70° | — | — |
| 2003 | 80° | 61° | 70° | — | — |
| 2002 | 89° | 60° | 75° | — | — |
| 2001 | 94° | 61° | 77° | — | — |
| 2000 | 83° | 61° | 72° | — | — |
| 1999 | 92° | 58° | 75° | — | — |
| 1998 | 87° | 56° | 71° | — | — |
| 1997 | 93° | 63° | 78° | — | — |
| 1996 | 98° | 57° | 78° | — | — |
| 1995 | 85° | 51° | 68° | — | — |
| 1994 | 94° | 58° | 76° | — | — |
| 1993 | 100° | 60° | 80° | — | — |
| 1992 | 89° | 55° | 72° | — | — |
| 1991 | 89° | 59° | 74° | — | — |
| 1990 | 88° | 59° | 73° | — | — |
| 1989 | 103° | 63° | 83° | — | — |
| 1988 | 88° | 55° | 71° | — | — |
| 1987 | 87° | 55° | 71° | — | — |
| 1986 | 91° | 55° | 73° | — | — |
| 1985 | 93° | 57° | 75° | — | — |
| 1984 | 94° | 56° | 75° | — | — |
| 1983 | 87° | 56° | 71° | — | — |
| 1982 | 66° | 56° | 61° | — | — |
| 1981warmest | 104° | 66° | 85° | — | — |
| 1980 | 87° | 56° | 71° | — | — |
| 1979 | 77° | 55° | 66° | — | — |
| 1978 | 97° | 52° | 74° | — | — |
| 1977 | 88° | 53° | 70° | — | — |
| 1976 | 91° | 60° | 76° | — | — |
| 1975coldest | 63° | 53° | 58° | — | — |
| 1974 | 87° | 52° | 69° | — | — |
| 1973 | 96° | 65° | 80° | — | — |
| 1972 | 89° | 64° | 77° | — | — |
| 1971 | 94° | 61° | 77° | — | — |
55 years of data from FONTANA KAISER