Weather on December 20
Irvine, CA
55 Years of Data
Avg High
68°F
Avg Low
42°F
Warmest
2005
66°F avg
Coldest
1990
46°F avg
About This Date
December 20th in Irvine, CA typically brings mild winter weather, with average highs around 68°F and lows near 42°F — a 26°F daily swing. Over 55 years of records, the warmest December 20th was in 2005 (66°F average), while the coldest was 1990 (46°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 20th dates historically, with the wettest December 20th recording 8.97" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 51° | 59° | — | — |
| 2024 | 74° | 44° | 59° | — | — |
| 2023 | 67° | 58° | 62° | 0.2" | — |
| 2022 | 71° | 42° | 57° | — | — |
| 2021 | 67° | 43° | 55° | — | — |
| 2020 | 77° | 45° | 61° | — | — |
| 2019 | 74° | 46° | 60° | — | — |
| 2018 | 70° | 50° | 60° | — | — |
| 2017 | 71° | 42° | 57° | — | — |
| 2016 | 77° | 46° | 62° | — | — |
| 2015 | 64° | 43° | 53° | — | — |
| 2014 | 70° | 50° | 60° | — | — |
| 2013 | 66° | 59° | 63° | — | — |
| 2012 | 70° | 37° | 53° | — | — |
| 2011 | 70° | 40° | 55° | — | — |
| 2010 | 60° | 54° | 57° | 8.97" | — |
| 2009 | 72° | 49° | 60° | — | — |
| 2008 | 61° | 40° | 50° | — | — |
| 2007 | 63° | 48° | 55° | — | — |
| 2006 | 62° | 39° | 51° | — | — |
| 2005warmest | 78° | 53° | 66° | — | — |
| 2004 | 72° | 46° | 59° | — | — |
| 2003 | 61° | 50° | 55° | — | — |
| 2002 | 65° | 35° | 50° | 2.16" | — |
| 2001 | 60° | 42° | 51° | — | — |
| 2000 | 73° | 40° | 56° | — | — |
| 1999 | 80° | 40° | 60° | — | — |
| 1998 | 62° | 48° | 55° | — | — |
| 1997 | 74° | 41° | 57° | — | — |
| 1996 | 75° | 37° | 56° | — | — |
| 1995 | 65° | 43° | 54° | — | — |
| 1994 | 77° | 30° | 54° | — | — |
| 1993 | 69° | 44° | 57° | — | — |
| 1992 | 64° | 29° | 46° | — | — |
| 1991 | 71° | 44° | 58° | — | — |
| 1990coldest | 55° | 37° | 46° | — | — |
| 1989 | 67° | 36° | 51° | — | — |
| 1988 | 60° | 40° | 50° | — | — |
| 1987 | 66° | 38° | 52° | — | — |
| 1986 | 67° | 46° | 56° | 1.45" | — |
| 1985 | 82° | 41° | 62° | — | — |
| 1984 | 57° | 42° | 50° | 1.63" | — |
| 1983 | 64° | 46° | 55° | — | — |
| 1982 | 65° | 34° | 49° | — | — |
| 1981 | 68° | 47° | 57° | — | — |
| 1980 | 70° | 35° | 52° | — | — |
| 1979 | 72° | 40° | 56° | — | — |
| 1978 | 63° | 33° | 48° | 0.18" | — |
| 1977 | 67° | 40° | 53° | — | — |
| 1976 | 71° | 42° | 57° | — | — |
| 1975 | 62° | 35° | 49° | — | — |
| 1974 | 69° | 39° | 54° | — | — |
| 1973 | 78° | 36° | 57° | — | — |
| 1972 | 80° | 43° | 61° | — | — |
| 1971 | 63° | 32° | 47° | — | — |
55 years of data from IRVINE RCH