Weather on December 21
Fairfield, CA
55 Years of Data
Avg High
54°F
Avg Low
38°F
Warmest
2014
60°F avg
Coldest
1990
31°F avg
About This Date
December 21st in Fairfield, CA typically brings cool winter weather, with average highs around 54°F and lows near 38°F. Over 55 years of records, the warmest December 21st was in 2014 (60°F average), while the coldest was 1990 (31°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 40% of December 21st dates historically, with the wettest December 21st recording 3.71" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Fairfield, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 55° | 59° | 1.02" | — |
| 2024 | 52° | 44° | 48° | 0.3" | — |
| 2023 | 64° | 50° | 57° | — | — |
| 2022 | 48° | 37° | 43° | — | — |
| 2021 | 47° | 38° | 42° | 0.2" | — |
| 2020 | — | 32° | — | — | — |
| 2019 | 56° | 43° | 49° | — | — |
| 2018 | 57° | 41° | 49° | 0.38" | — |
| 2017 | 60° | 40° | 50° | — | — |
| 2016 | 63° | 38° | 50° | — | — |
| 2015 | 57° | 45° | 51° | 3.71" | — |
| 2014warmest | 67° | 54° | 60° | 0.05" | — |
| 2013 | 59° | 35° | 47° | — | — |
| 2012 | 52° | 43° | 47° | 0.89" | — |
| 2011 | 53° | 27° | 40° | — | — |
| 2010 | 51° | 44° | 48° | 0.76" | — |
| 2009 | 52° | 47° | 49° | 0.18" | — |
| 2008 | 53° | 34° | 43° | — | — |
| 2007 | 56° | 38° | 47° | — | — |
| 2006 | 53° | 32° | 43° | — | — |
| 2005 | 60° | 49° | 54° | 0.89" | — |
| 2004 | 64° | 35° | 50° | — | — |
| 2003 | 53° | 49° | 51° | 0.2" | — |
| 2002 | 56° | 44° | 50° | 1.45" | — |
| 2001 | 53° | 44° | 49° | 1.12" | — |
| 2000 | 61° | 38° | 49° | — | — |
| 1999 | 69° | 37° | 53° | — | — |
| 1998 | 46° | 23° | 35° | — | — |
| 1997 | 54° | 34° | 44° | — | — |
| 1996 | 51° | 42° | 47° | 2.92" | — |
| 1995 | 49° | 35° | 42° | — | — |
| 1994 | 46° | 39° | 43° | — | — |
| 1993 | 44° | 33° | 39° | — | — |
| 1992 | 51° | 37° | 44° | — | — |
| 1991 | 55° | 32° | 44° | — | — |
| 1990coldest | 37° | 25° | 31° | — | — |
| 1989 | 40° | 33° | 36° | — | — |
| 1988 | 52° | 36° | 44° | 2.39" | — |
| 1987 | 49° | 33° | 41° | — | — |
| 1986 | 61° | 35° | 48° | — | — |
| 1985 | 40° | 25° | 32° | — | — |
| 1984 | 57° | 29° | 43° | — | — |
| 1983 | 58° | 33° | 45° | — | — |
| 1982 | 56° | 45° | 50° | 0.89" | — |
| 1981 | 65° | 50° | 57° | 0.18" | — |
| 1980 | 58° | 36° | 47° | — | — |
| 1979 | 53° | 45° | 49° | 1.52" | — |
| 1978 | 50° | 26° | 38° | — | — |
| 1977 | 53° | 43° | 48° | 0.05" | — |
| 1976 | 61° | 29° | 45° | — | — |
| 1975 | 61° | 30° | 45° | — | — |
| 1974 | 45° | 38° | 41° | — | — |
| 1973 | 49° | 42° | 45° | 1.09" | — |
| 1972 | 58° | 51° | 54° | 0.03" | — |
| 1971 | 42° | 29° | 35° | 0.05" | — |
55 years of data from FAIRFIELD