Weather on December 15
Fullerton, CA
55 Years of Data
Avg High
70°F
Avg Low
46°F
Warmest
2013
72°F avg
Coldest
1987
47°F avg
About This Date
December 15th in Fullerton, CA typically brings pleasant winter weather, with average highs around 70°F and lows near 46°F. Over 55 years of records, the warmest December 15th was in 2013 (72°F average), while the coldest was 1987 (47°F) — a 25°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 4.88" 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 Fullerton, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 50° | 58° | — | — |
| 2024 | 67° | 50° | 58° | — | — |
| 2023 | 81° | 51° | 66° | — | — |
| 2022 | 67° | 46° | 56° | — | — |
| 2021 | 61° | 40° | 50° | — | — |
| 2020 | 73° | 43° | 58° | — | — |
| 2019 | 68° | 50° | 59° | — | — |
| 2018 | 76° | 48° | 62° | — | — |
| 2017 | 82° | 55° | 69° | — | — |
| 2016 | 72° | 53° | 62° | 3.78" | — |
| 2015 | 65° | 37° | 51° | 0.1" | — |
| 2014 | 66° | 49° | 57° | — | — |
| 2013warmest | 84° | 59° | 72° | — | — |
| 2012 | 63° | 45° | 54° | 0.25" | — |
| 2011 | 60° | 42° | 51° | — | — |
| 2010 | 62° | 54° | 58° | — | — |
| 2009 | 74° | 46° | 60° | — | — |
| 2008 | 57° | 47° | 52° | 4.88" | — |
| 2007 | 70° | 43° | 56° | — | — |
| 2006 | 75° | 48° | 62° | — | — |
| 2005 | 65° | 49° | 57° | — | — |
| 2004 | 79° | 49° | 64° | — | — |
| 2003 | 70° | 42° | 56° | — | — |
| 2002 | 65° | 52° | 58° | — | — |
| 2001 | 65° | 36° | 50° | — | — |
| 2000 | 64° | 45° | 54° | — | — |
| 1999 | 79° | 46° | 62° | — | — |
| 1998 | 83° | 43° | 63° | — | — |
| 1997 | 69° | 52° | 60° | — | — |
| 1996 | 79° | 60° | 69° | — | — |
| 1995 | 69° | 49° | 59° | — | — |
| 1994 | 66° | 43° | 54° | — | — |
| 1993 | 61° | 41° | 51° | 0.48" | — |
| 1992 | 65° | 42° | 53° | — | — |
| 1991 | 78° | 48° | 63° | — | — |
| 1990 | 64° | 42° | 53° | — | — |
| 1989 | 73° | 45° | 59° | — | — |
| 1988 | 59° | 53° | 56° | 0.69" | — |
| 1987coldest | 56° | 38° | 47° | — | — |
| 1986 | 70° | 50° | 60° | — | — |
| 1985 | 71° | 42° | 57° | — | — |
| 1984 | 61° | 40° | 50° | — | — |
| 1983 | 71° | 46° | 59° | — | — |
| 1982 | 72° | 42° | 57° | — | — |
| 1981 | 76° | 45° | 60° | — | — |
| 1980 | 88° | 44° | 66° | — | — |
| 1979 | 78° | 36° | 57° | — | — |
| 1978 | 69° | 42° | 56° | — | — |
| 1977 | 70° | 52° | 61° | — | — |
| 1976 | 82° | 43° | 62° | — | — |
| 1975 | 73° | 40° | 56° | — | — |
| 1974 | 75° | 42° | 59° | — | — |
| 1973 | 79° | 42° | 60° | — | — |
| 1972 | 68° | 36° | 52° | — | — |
| 1971 | 61° | 37° | 49° | — | — |
55 years of data from ANAHEIM