Weather on May 9
Fontana, CA
55 Years of Data
Avg High
79°F
Avg Low
54°F
Warmest
2025
79°F avg
Coldest
1977
51°F avg
About This Date
May 9th in Fontana, CA typically brings pleasant spring weather, with average highs around 79°F and lows near 54°F — a 25°F daily swing. Over 55 years of records, the warmest May 9th was in 2025 (79°F average), while the coldest was 1977 (51°F) — a 28°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 May 9th in Fontana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 100° | 57° | 79° | — | — |
| 2024 | 82° | 55° | 69° | — | — |
| 2023 | 69° | 52° | 60° | — | — |
| 2022 | 69° | 52° | 60° | — | — |
| 2021 | 76° | 57° | 66° | — | — |
| 2020 | 86° | 61° | 73° | — | — |
| 2019 | 68° | 60° | 64° | — | — |
| 2018 | 88° | 57° | 72° | — | — |
| 2017 | 73° | 52° | 62° | — | — |
| 2016 | 72° | 57° | 64° | — | — |
| 2015 | 66° | 54° | 60° | — | — |
| 2014 | 76° | 54° | 65° | — | — |
| 2013 | 77° | 54° | 65° | — | — |
| 2012 | 91° | 58° | 74° | — | — |
| 2011 | 64° | 52° | 58° | — | — |
| 2010 | 68° | 51° | 60° | — | — |
| 2009 | 86° | 57° | 72° | — | — |
| 2008 | 68° | 52° | 60° | — | — |
| 2007 | 94° | 62° | 78° | — | — |
| 2006 | 72° | 57° | 64° | — | — |
| 2005 | 66° | 51° | 59° | — | — |
| 2004 | 87° | 55° | 71° | — | — |
| 2003 | 69° | 49° | 59° | — | — |
| 2002 | 79° | 52° | 65° | — | — |
| 2001 | 90° | 61° | 75° | — | — |
| 2000 | 81° | 55° | 68° | — | — |
| 1999 | 66° | 54° | 60° | — | — |
| 1998 | 72° | 50° | 61° | — | — |
| 1997 | 93° | 57° | 75° | — | — |
| 1996 | 82° | 55° | 69° | — | — |
| 1995 | 76° | 46° | 61° | — | — |
| 1994 | 75° | 51° | 63° | — | — |
| 1993 | 96° | 56° | 76° | — | — |
| 1992 | 75° | 61° | 68° | — | — |
| 1991 | 77° | 55° | 66° | — | — |
| 1990 | 80° | 54° | 67° | — | — |
| 1989 | 82° | 59° | 71° | — | — |
| 1988 | 85° | 48° | 66° | — | — |
| 1987 | 88° | 62° | 75° | — | — |
| 1986 | 88° | 44° | 66° | — | — |
| 1985 | 72° | 53° | 62° | — | — |
| 1984 | 98° | 54° | 76° | — | — |
| 1983 | 72° | 51° | 61° | — | — |
| 1982 | 63° | 50° | 56° | — | — |
| 1981 | 95° | 51° | 73° | — | — |
| 1980 | 63° | 53° | 58° | — | — |
| 1979 | 70° | 36° | 53° | — | — |
| 1978 | 86° | 48° | 67° | — | — |
| 1977coldest | 57° | 45° | 51° | — | — |
| 1976 | 88° | 53° | 70° | — | — |
| 1975 | 85° | 52° | 68° | — | — |
| 1974 | 77° | 55° | 66° | — | — |
| 1973 | 92° | 56° | 74° | — | — |
| 1972 | 78° | 52° | 65° | — | — |
| 1971 | 75° | 50° | 63° | — | — |
55 years of data from FONTANA KAISER