Weather on December 31
Fontana, CA
55 Years of Data
Avg High
65°F
Avg Low
42°F
Warmest
1997
67°F avg
Coldest
2010
42°F avg
About This Date
December 31st in Fontana, CA typically brings mild winter weather, with average highs around 65°F and lows near 42°F. Over 54 years of records, the warmest December 31st was in 1997 (67°F average), while the coldest was 2010 (42°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 31st dates historically, with the wettest December 31st recording 1.6" 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 31st in Fontana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 53° | 59° | 0.76" | — |
| 2024 | 66° | 44° | 55° | — | — |
| 2023 | 59° | 49° | 54° | — | — |
| 2022 | 57° | 53° | 55° | — | — |
| 2021 | 60° | 43° | 51° | — | — |
| 2020 | 66° | 38° | 52° | — | — |
| 2019 | 71° | 45° | 58° | — | — |
| 2018 | 60° | 44° | 52° | — | — |
| 2017 | 71° | 47° | 59° | — | — |
| 2016 | 54° | 44° | 49° | 0.41" | — |
| 2015 | 64° | 34° | 49° | — | — |
| 2014 | 52° | 32° | 42° | — | — |
| 2013 | 73° | 42° | 58° | — | — |
| 2012 | 57° | 33° | 45° | — | — |
| 2011 | 79° | 43° | 61° | — | — |
| 2010coldest | 53° | 30° | 42° | — | — |
| 2009 | 66° | 40° | 53° | 0.03" | — |
| 2008 | 70° | 45° | 57° | — | — |
| 2007 | 74° | 38° | 56° | — | — |
| 2006 | 63° | 37° | 50° | — | — |
| 2005 | 56° | 46° | 51° | 1.52" | — |
| 2004 | 54° | 41° | 47° | 1.6" | — |
| 2003 | 64° | 38° | 51° | — | — |
| 2002 | 59° | 42° | 51° | — | — |
| 2001 | 59° | 50° | 55° | — | — |
| 2000 | 76° | 39° | 57° | — | — |
| 1999 | 53° | 46° | 50° | 0.66" | — |
| 1998 | 63° | 44° | 53° | — | — |
| 1997warmest | 82° | 51° | 67° | — | — |
| 1996 | 69° | 53° | 61° | — | — |
| 1995 | 71° | 44° | 58° | — | — |
| 1994 | 63° | 38° | 50° | — | — |
| 1993 | 78° | 39° | 59° | — | — |
| 1992 | 66° | 36° | 51° | — | — |
| 1991 | 66° | 37° | 52° | — | — |
| 1990 | 59° | 40° | 49° | — | — |
| 1989 | 78° | 37° | 58° | — | — |
| 1988 | 53° | 32° | 43° | 0.13" | — |
| 1987 | 60° | 32° | 46° | — | — |
| 1986 | 67° | 33° | 50° | — | — |
| 1985 | 65° | 46° | 55° | — | — |
| 1984 | 70° | 35° | 52° | — | — |
| 1983 | 73° | 44° | 59° | — | — |
| 1981 | 54° | 48° | 51° | — | — |
| 1980 | 78° | 44° | 61° | — | — |
| 1979 | 73° | 32° | 53° | — | — |
| 1978 | 64° | 33° | 49° | — | — |
| 1977 | 66° | 51° | 59° | — | — |
| 1976 | 58° | 48° | 53° | 0.28" | — |
| 1975 | 61° | 48° | 54° | — | — |
| 1974 | 58° | 47° | 52° | — | — |
| 1973 | 66° | 44° | 55° | — | — |
| 1972 | 64° | 37° | 51° | — | — |
| 1971 | 63° | 50° | 56° | — | — |
54 years of data from FONTANA KAISER