Weather on December 17
Fullerton, CA
55 Years of Data
Avg High
70°F
Avg Low
48°F
Warmest
1985
72°F avg
Coldest
1975
50°F avg
About This Date
December 17th in Fullerton, CA typically brings pleasant winter weather, with average highs around 70°F and lows near 48°F. Over 55 years of records, the warmest December 17th was in 1985 (72°F average), while the coldest was 1975 (50°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 16% of December 17th dates historically, with the wettest December 17th recording 3.81" of rain. The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 52° | 60° | — | — |
| 2024 | 74° | 47° | 60° | — | — |
| 2023 | 78° | 53° | 66° | — | — |
| 2022 | 72° | 53° | 62° | — | — |
| 2021 | 71° | 45° | 58° | 0.1" | — |
| 2020 | 70° | 48° | 59° | — | — |
| 2019 | 67° | 54° | 60° | — | — |
| 2018 | 68° | 54° | 61° | — | — |
| 2017 | 73° | 53° | 63° | — | — |
| 2016 | 63° | 40° | 51° | — | — |
| 2015 | 72° | 42° | 57° | — | — |
| 2014 | 66° | 50° | 58° | 0.94" | — |
| 2013 | 79° | 53° | 66° | — | — |
| 2012 | 67° | 53° | 60° | 3.81" | — |
| 2011 | 67° | 56° | 61° | — | — |
| 2010 | 60° | 51° | 56° | 0.18" | — |
| 2009 | 81° | 48° | 64° | — | — |
| 2008 | 56° | 45° | 50° | 0.97" | — |
| 2007 | 64° | 43° | 53° | — | — |
| 2006 | 59° | 43° | 51° | 0.33" | — |
| 2005 | 62° | 50° | 56° | — | — |
| 2004 | 79° | 63° | 71° | — | — |
| 2003 | 78° | 61° | 69° | — | — |
| 2002 | 58° | 50° | 54° | 1.73" | — |
| 2001 | 65° | 39° | 52° | — | — |
| 2000 | 81° | 47° | 64° | — | — |
| 1999 | 81° | 50° | 65° | — | — |
| 1998 | 87° | 49° | 68° | — | — |
| 1997 | 71° | 49° | 60° | — | — |
| 1996 | 76° | 49° | 62° | — | — |
| 1995 | 70° | 39° | 54° | — | — |
| 1994 | 74° | 46° | 60° | — | — |
| 1993 | 69° | 45° | 57° | — | — |
| 1992 | 64° | 44° | 54° | — | — |
| 1991 | 76° | 54° | 65° | — | — |
| 1990 | 64° | 37° | 51° | — | — |
| 1989 | 67° | 42° | 54° | — | — |
| 1988 | 62° | 45° | 53° | — | — |
| 1987 | 57° | 46° | 52° | 1.07" | — |
| 1986 | 74° | 47° | 60° | — | — |
| 1985warmest | 84° | 61° | 72° | — | — |
| 1984 | 60° | 42° | 51° | — | — |
| 1983 | 64° | 54° | 59° | — | — |
| 1982 | 69° | 40° | 54° | — | — |
| 1981 | 73° | 42° | 58° | — | — |
| 1980 | 83° | 50° | 66° | — | — |
| 1979 | 82° | 33° | 58° | — | — |
| 1978 | 59° | 45° | 52° | 3.05" | — |
| 1977 | 64° | 52° | 58° | — | — |
| 1976 | 76° | 46° | 61° | — | — |
| 1975coldest | 66° | 34° | 50° | — | — |
| 1974 | 74° | 46° | 60° | — | — |
| 1973 | 69° | 44° | 57° | — | — |
| 1972 | 68° | 47° | 57° | — | — |
| 1971 | 71° | 49° | 60° | — | — |
55 years of data from ANAHEIM