Weather on May 15
Fontana, CA
55 Years of Data
Avg High
79°F
Avg Low
55°F
Warmest
2014
84°F avg
Coldest
2011
56°F avg
About This Date
May 15th in Fontana, CA typically brings pleasant spring weather, with average highs around 79°F and lows near 55°F. Over 55 years of records, the warmest May 15th was in 2014 (84°F average), while the coldest was 2011 (56°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 15th dates historically. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for May 15th in Fontana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 54° | 67° | — | — |
| 2024 | 69° | 57° | 63° | — | — |
| 2023 | 83° | 58° | 70° | — | — |
| 2022 | 89° | 58° | 73° | — | — |
| 2021 | 72° | 59° | 65° | — | — |
| 2020 | 83° | 58° | 70° | — | — |
| 2019 | 75° | 62° | 69° | — | — |
| 2018 | 77° | 52° | 64° | — | — |
| 2017 | 63° | 51° | 57° | 0.38" | — |
| 2016 | 67° | 59° | 63° | — | — |
| 2015 | 66° | 51° | 59° | 0.08" | — |
| 2014warmest | 102° | 66° | 84° | — | — |
| 2013 | 82° | 56° | 69° | — | — |
| 2012 | 83° | 53° | 68° | — | — |
| 2011coldest | 64° | 49° | 56° | 0.36" | — |
| 2010 | 85° | 53° | 69° | — | — |
| 2009 | 88° | 57° | 72° | — | — |
| 2008 | 100° | 61° | 80° | — | — |
| 2007 | 76° | 55° | 65° | — | — |
| 2006 | 84° | 58° | 71° | — | — |
| 2005 | 89° | 59° | 74° | — | — |
| 2004 | 88° | 57° | 72° | — | — |
| 2003 | 75° | 52° | 63° | — | — |
| 2002 | 76° | 56° | 66° | — | — |
| 2001 | 79° | 54° | 66° | — | — |
| 2000 | 77° | 52° | 64° | 0.05" | — |
| 1999 | 70° | 53° | 61° | — | — |
| 1998 | 74° | 47° | 60° | — | — |
| 1997 | 96° | 60° | 78° | — | — |
| 1996 | 85° | 61° | 73° | — | — |
| 1995 | 71° | 48° | 60° | — | — |
| 1994 | 65° | 58° | 61° | — | — |
| 1993 | 90° | 62° | 76° | — | — |
| 1992 | 79° | 60° | 69° | — | — |
| 1991 | 88° | 50° | 69° | — | — |
| 1990 | 75° | 57° | 66° | — | — |
| 1989 | 65° | 56° | 60° | — | — |
| 1988 | 88° | 57° | 72° | — | — |
| 1987 | 80° | 61° | 70° | — | — |
| 1986 | 73° | 54° | 63° | — | — |
| 1985 | 86° | 49° | 67° | — | — |
| 1984 | 76° | 50° | 63° | — | — |
| 1983 | 76° | 46° | 61° | — | — |
| 1982 | 78° | 46° | 62° | — | — |
| 1981 | 65° | 54° | 59° | 0.3" | — |
| 1980 | 67° | 49° | 58° | — | — |
| 1979 | 94° | 46° | 70° | — | — |
| 1978 | 90° | 56° | 73° | — | — |
| 1977 | 65° | 55° | 60° | — | — |
| 1976 | 89° | 57° | 73° | — | — |
| 1975 | 74° | 53° | 63° | — | — |
| 1974 | 66° | 54° | 60° | — | — |
| 1973 | 81° | 53° | 67° | — | — |
| 1972 | 96° | 65° | 80° | — | — |
| 1971 | 81° | 55° | 68° | — | — |
55 years of data from FONTANA KAISER