Weather on December 21
Irvine, CA
55 Years of Data
Avg High
67°F
Avg Low
43°F
Warmest
2020
70°F avg
Coldest
1990
40°F avg
About This Date
December 21st in Irvine, CA typically brings mild winter weather, with average highs around 67°F and lows near 43°F. Over 55 years of records, the warmest December 21st was in 2020 (70°F average), while the coldest was 1990 (40°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 20% of December 21st dates historically, with the wettest December 21st recording 7.62" of rain. The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 51° | 62° | — | — |
| 2024 | 64° | 48° | 56° | — | — |
| 2023 | 69° | 57° | 63° | 0.76" | — |
| 2022 | 73° | 43° | 58° | — | — |
| 2021 | 68° | 51° | 60° | — | — |
| 2020warmest | 82° | 57° | 70° | — | — |
| 2019 | 73° | 50° | 62° | — | — |
| 2018 | 70° | 52° | 61° | — | — |
| 2017 | 63° | 42° | 52° | — | — |
| 2016 | 70° | 57° | 63° | 0.3" | — |
| 2015 | 64° | 44° | 54° | — | — |
| 2014 | 69° | 49° | 59° | — | — |
| 2013 | 69° | 55° | 62° | — | — |
| 2012 | 67° | 39° | 53° | — | — |
| 2011 | 68° | 40° | 54° | — | — |
| 2010 | 60° | 53° | 57° | 7.62" | — |
| 2009 | 67° | 49° | 58° | — | — |
| 2008 | 65° | 40° | 52° | — | — |
| 2007 | 64° | 43° | 53° | 0.13" | — |
| 2006 | 63° | 44° | 53° | — | — |
| 2005 | 83° | 54° | 68° | — | — |
| 2004 | 65° | 47° | 56° | — | — |
| 2003 | 61° | 49° | 55° | — | — |
| 2002 | 64° | 42° | 53° | — | — |
| 2001 | 51° | 41° | 46° | 0.71" | — |
| 2000 | 68° | 39° | 54° | — | — |
| 1999 | 78° | 41° | 60° | — | — |
| 1998 | 62° | 39° | 51° | — | — |
| 1997 | 64° | 40° | 52° | 1.78" | — |
| 1996 | 63° | 41° | 52° | — | — |
| 1995 | 66° | 39° | 53° | — | — |
| 1994 | 73° | 35° | 54° | — | — |
| 1993 | 70° | 42° | 56° | — | — |
| 1992 | 63° | 30° | 46° | — | — |
| 1991 | 72° | 42° | 57° | — | — |
| 1990coldest | 50° | 31° | 40° | — | — |
| 1989 | 65° | 37° | 51° | — | — |
| 1988 | 63° | 50° | 56° | 1.65" | — |
| 1987 | 66° | 35° | 51° | — | — |
| 1986 | 63° | 40° | 51° | 0.03" | — |
| 1985 | 76° | 39° | 57° | — | — |
| 1984 | 59° | 36° | 47° | — | — |
| 1983 | 62° | 44° | 53° | — | — |
| 1982 | 59° | 35° | 47° | — | — |
| 1981 | 64° | 48° | 56° | 0.36" | — |
| 1980 | 75° | 36° | 55° | — | — |
| 1979 | 70° | 39° | 54° | 0.3" | — |
| 1978 | 65° | 34° | 49° | — | — |
| 1977 | 70° | 46° | 58° | — | — |
| 1976 | 70° | 38° | 54° | — | — |
| 1975 | 65° | 36° | 50° | 0.28" | — |
| 1974 | 71° | 37° | 54° | — | — |
| 1973 | 75° | 36° | 55° | — | — |
| 1972 | 78° | 43° | 60° | — | — |
| 1971 | 58° | 34° | 46° | — | — |
55 years of data from IRVINE RCH