Weather on December 18
Irvine, CA
55 Years of Data
Avg High
68°F
Avg Low
45°F
Warmest
2024
73°F avg
Coldest
2011
46°F avg
About This Date
December 18th in Irvine, CA typically brings mild winter weather, with average highs around 68°F and lows near 45°F. Over 55 years of records, the warmest December 18th was in 2024 (73°F average), while the coldest was 2011 (46°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 18th dates historically, with the wettest December 18th recording 2.79" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 51° | 65° | — | — |
| 2024warmest | 85° | 62° | 73° | — | — |
| 2023 | 75° | 57° | 66° | — | — |
| 2022 | 71° | 44° | 58° | — | — |
| 2021 | 73° | 52° | 62° | — | — |
| 2020 | 72° | 46° | 59° | — | — |
| 2019 | 65° | 44° | 54° | — | — |
| 2018 | 65° | 51° | 58° | 0.2" | — |
| 2017 | 72° | 50° | 61° | — | — |
| 2016 | 68° | 39° | 54° | — | — |
| 2015 | 71° | 44° | 58° | — | — |
| 2014 | 66° | 50° | 58° | — | — |
| 2013 | 75° | 57° | 66° | — | — |
| 2012 | 61° | 49° | 55° | — | — |
| 2011coldest | 58° | 35° | 46° | — | — |
| 2010 | 56° | 53° | 54° | — | — |
| 2009 | 76° | 47° | 61° | — | — |
| 2008 | 57° | 42° | 50° | 0.94" | — |
| 2007 | 64° | 46° | 55° | — | — |
| 2006 | 59° | 39° | 49° | — | — |
| 2005 | 62° | 43° | 52° | — | — |
| 2004 | 73° | 60° | 67° | — | — |
| 2003 | 80° | 59° | 70° | — | — |
| 2002 | 66° | 38° | 52° | — | — |
| 2001 | 62° | 38° | 50° | — | — |
| 2000 | 78° | 42° | 60° | — | — |
| 1999 | 74° | 43° | 58° | — | — |
| 1998 | 74° | 51° | 62° | — | — |
| 1997 | 69° | 47° | 58° | — | — |
| 1996 | 74° | 55° | 64° | — | — |
| 1995 | 66° | 35° | 51° | — | — |
| 1994 | 74° | 35° | 54° | — | — |
| 1993 | 65° | 37° | 51° | — | — |
| 1992 | 61° | 39° | 50° | 0.76" | — |
| 1991 | 66° | 49° | 57° | 0.03" | — |
| 1990 | 64° | 33° | 49° | — | — |
| 1989 | 60° | 39° | 50° | — | — |
| 1988 | 58° | 40° | 49° | 1.73" | — |
| 1987 | 68° | 51° | 60° | — | — |
| 1986 | 73° | 43° | 58° | — | — |
| 1985 | 82° | 47° | 64° | — | — |
| 1984 | 55° | 41° | 48° | 0.25" | — |
| 1983 | 69° | 44° | 57° | — | — |
| 1982 | 67° | — | — | — | — |
| 1981 | 66° | 42° | 54° | — | — |
| 1980 | 64° | 47° | 55° | — | — |
| 1979 | 78° | 38° | 58° | — | — |
| 1978 | 55° | 51° | 53° | 2.79" | — |
| 1977 | 65° | 49° | 57° | 1.12" | — |
| 1976 | 77° | 40° | 58° | — | — |
| 1975 | 65° | 34° | 49° | — | — |
| 1974 | 72° | 38° | 55° | — | — |
| 1973 | 68° | 40° | 54° | — | — |
| 1972 | 72° | 40° | 56° | — | — |
| 1971 | 63° | 35° | 49° | — | — |
55 years of data from IRVINE RCH