Weather on December 17
Fontana, CA
55 Years of Data
Avg High
68°F
Avg Low
43°F
Warmest
1998
69°F avg
Coldest
1984
45°F avg
About This Date
December 17th in Fontana, CA typically brings mild winter weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 55 years of records, the warmest December 17th was in 1998 (69°F average), while the coldest was 1984 (45°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 17th dates historically, with the wettest December 17th recording 2.21" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Fontana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 51° | 62° | — | — |
| 2024 | 80° | 46° | 63° | — | — |
| 2023 | 78° | 46° | 62° | — | — |
| 2022 | 63° | 36° | 49° | — | — |
| 2021 | 64° | 41° | 53° | — | — |
| 2020 | 63° | 48° | 55° | — | — |
| 2019 | 68° | 38° | 53° | — | — |
| 2018 | 65° | 47° | 56° | — | — |
| 2017 | 70° | 47° | 58° | — | — |
| 2016 | 56° | 38° | 47° | — | — |
| 2015 | 66° | 37° | 52° | — | — |
| 2014 | 60° | 50° | 55° | 1.24" | — |
| 2013 | 84° | 52° | 68° | — | — |
| 2012 | 60° | 52° | 56° | — | — |
| 2011 | 63° | 48° | 55° | — | — |
| 2010 | 54° | 48° | 51° | 0.91" | — |
| 2009 | 74° | 44° | 59° | — | — |
| 2008 | 51° | 40° | 45° | 2.21" | — |
| 2007 | 60° | 38° | 49° | — | — |
| 2006 | 54° | 39° | 46° | 0.03" | — |
| 2005 | 57° | 49° | 53° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 73° | 39° | 56° | — | — |
| 2002 | 56° | 44° | 50° | 0.25" | — |
| 2001 | 63° | 37° | 50° | — | — |
| 2000 | 77° | 41° | 59° | — | — |
| 1999 | 81° | 45° | 63° | — | — |
| 1998warmest | 85° | 53° | 69° | — | — |
| 1997 | 74° | 40° | 57° | — | — |
| 1996 | 70° | 44° | 57° | — | — |
| 1995 | 69° | 43° | 56° | — | — |
| 1994 | 82° | 40° | 61° | — | — |
| 1993 | 65° | 35° | 50° | — | — |
| 1992 | 62° | 37° | 50° | — | — |
| 1991 | 70° | 49° | 59° | — | — |
| 1990 | 65° | 33° | 49° | — | — |
| 1989 | 69° | 37° | 53° | — | — |
| 1988 | 62° | 41° | 52° | 0.48" | — |
| 1987 | 51° | 43° | 47° | 0.79" | — |
| 1986 | 74° | 37° | 55° | — | — |
| 1985 | 76° | 42° | 59° | — | — |
| 1984coldest | 59° | 31° | 45° | — | — |
| 1983 | 60° | 43° | 51° | — | — |
| 1982 | 72° | 31° | 51° | — | — |
| 1981 | 77° | 45° | 61° | — | — |
| 1980 | 78° | 51° | 65° | — | — |
| 1979 | 85° | 38° | 61° | — | — |
| 1978 | 60° | 47° | 53° | 1.07" | — |
| 1977 | 63° | 44° | 53° | — | — |
| 1976 | 77° | 38° | 57° | — | — |
| 1975 | 70° | 43° | 56° | — | — |
| 1974 | 68° | 50° | 59° | — | — |
| 1973 | 76° | 47° | 61° | — | — |
| 1972 | 67° | 48° | 57° | — | — |
| 1971 | 68° | 49° | 58° | — | — |
55 years of data from FONTANA KAISER