Weather on December 15
Fontana, CA
55 Years of Data
Avg High
68°F
Avg Low
42°F
Warmest
1980
68°F avg
Coldest
1987
42°F avg
About This Date
December 15th in Fontana, CA typically brings mild winter weather, with average highs around 68°F and lows near 42°F — a 26°F daily swing. Over 55 years of records, the warmest December 15th was in 1980 (68°F average), while the coldest was 1987 (42°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 15th dates historically, with the wettest December 15th recording 4.32" of rain. 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 December 15th in Fontana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 49° | 63° | — | — |
| 2024 | 66° | 45° | 55° | — | — |
| 2023 | 79° | 44° | 61° | — | — |
| 2022 | 60° | 40° | 50° | — | — |
| 2021 | 53° | 36° | 44° | — | — |
| 2020 | 69° | 42° | 56° | — | — |
| 2019 | 62° | 46° | 54° | — | — |
| 2018 | 74° | 46° | 60° | — | — |
| 2017 | 81° | 48° | 64° | — | — |
| 2016 | 67° | 51° | 59° | 0.76" | — |
| 2015 | 58° | 32° | 45° | — | — |
| 2014 | 64° | 46° | 55° | — | — |
| 2013 | 81° | 42° | 61° | — | — |
| 2012 | 57° | 43° | 50° | 0.08" | — |
| 2011 | 55° | 39° | 47° | 1.12" | — |
| 2010 | 55° | 50° | 53° | — | — |
| 2009 | 69° | 41° | 55° | — | — |
| 2008 | 51° | 43° | 47° | 4.32" | — |
| 2007 | 68° | 37° | 53° | — | — |
| 2006 | 71° | 47° | 59° | — | — |
| 2005 | 64° | 43° | 53° | — | — |
| 2004 | 77° | 45° | 61° | — | — |
| 2003 | 68° | 41° | 55° | — | — |
| 2002 | 64° | 50° | 57° | — | — |
| 2001 | 57° | 33° | 45° | — | — |
| 2000 | 60° | 44° | 52° | — | — |
| 1999 | 72° | 43° | 57° | — | — |
| 1998 | 79° | 41° | 60° | — | — |
| 1997 | 70° | 44° | 57° | — | — |
| 1996 | 69° | 52° | 60° | — | — |
| 1995 | 73° | 44° | 59° | — | — |
| 1994 | 66° | 37° | 52° | — | — |
| 1993 | 59° | 35° | 47° | 0.56" | — |
| 1992 | 63° | 34° | 48° | — | — |
| 1991 | 80° | 45° | 62° | — | — |
| 1990 | 70° | 35° | 52° | — | — |
| 1989 | 69° | 40° | 54° | — | — |
| 1988 | 56° | 44° | 50° | 0.46" | — |
| 1987coldest | 55° | 29° | 42° | — | — |
| 1986 | 68° | 42° | 55° | — | — |
| 1985 | 73° | 38° | 55° | — | — |
| 1984 | 59° | 30° | 45° | — | — |
| 1983 | 68° | 40° | 54° | — | — |
| 1982 | 69° | 35° | 52° | — | — |
| 1981 | 74° | 42° | 58° | — | — |
| 1980warmest | 83° | 53° | 68° | — | — |
| 1979 | 78° | 37° | 58° | — | — |
| 1978 | 70° | 32° | 51° | — | — |
| 1977 | 72° | 43° | 57° | — | — |
| 1976 | 78° | 41° | 60° | — | — |
| 1975 | 70° | 41° | 55° | — | — |
| 1974 | 67° | 48° | 57° | — | — |
| 1973 | 84° | 46° | 65° | — | — |
| 1972 | 62° | 39° | 51° | — | — |
| 1971 | 58° | 40° | 49° | — | — |
55 years of data from FONTANA KAISER