Weather on December 1
Irvine, CA
55 Years of Data
Avg High
71°F
Avg Low
45°F
Warmest
2013
71°F avg
Coldest
1985
50°F avg
About This Date
December 1st in Irvine, CA typically brings pleasant winter weather, with average highs around 71°F and lows near 45°F — a 26°F daily swing. Over 55 years of records, the warmest December 1st was in 2013 (71°F average), while the coldest was 1985 (50°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 5% of December 1st dates historically, with the wettest December 1st recording 1.7" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for December 1st in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 49° | 60° | — | — |
| 2024 | 72° | 51° | 61° | — | — |
| 2023 | 70° | 49° | 59° | — | — |
| 2022 | 62° | 53° | 58° | — | — |
| 2021 | 79° | 51° | 65° | — | — |
| 2020 | 77° | 50° | 64° | — | — |
| 2019 | 70° | 45° | 57° | — | — |
| 2018 | 70° | 51° | 60° | — | — |
| 2017 | 74° | 47° | 60° | — | — |
| 2016 | 70° | 48° | 59° | — | — |
| 2015 | 71° | 45° | 58° | — | — |
| 2014 | 71° | 52° | 61° | — | — |
| 2013warmest | 83° | 59° | 71° | — | — |
| 2012 | 67° | 49° | 58° | — | — |
| 2011 | 68° | 41° | 55° | — | — |
| 2010 | 74° | 58° | 66° | — | — |
| 2009 | 69° | 46° | 58° | — | — |
| 2008 | 74° | 46° | 60° | — | — |
| 2007 | 59° | 46° | 53° | — | — |
| 2006 | 74° | 45° | 59° | — | — |
| 2005 | 71° | 46° | 59° | — | — |
| 2004 | 63° | 44° | 53° | — | — |
| 2003 | 68° | 53° | 61° | — | — |
| 2002 | 70° | 46° | 58° | — | — |
| 2001 | 63° | 40° | 51° | — | — |
| 2000 | 62° | 44° | 53° | — | — |
| 1999 | 71° | 48° | 60° | — | — |
| 1998 | 64° | 46° | 55° | 1.7" | — |
| 1997 | 72° | 46° | 59° | 0.08" | — |
| 1996 | 72° | 37° | 54° | — | — |
| 1995 | 77° | 43° | 60° | — | — |
| 1994 | 75° | 34° | 54° | — | — |
| 1993 | 76° | 44° | 60° | — | — |
| 1992 | 74° | 33° | 53° | — | — |
| 1991 | 65° | 47° | 56° | — | — |
| 1990 | 74° | 37° | 55° | — | — |
| 1989 | 76° | 34° | 55° | — | — |
| 1988 | 82° | 45° | 63° | — | — |
| 1987 | 67° | 39° | 53° | — | — |
| 1986 | 79° | 38° | 58° | — | — |
| 1985coldest | 59° | 41° | 50° | — | — |
| 1984 | 68° | 44° | 56° | — | — |
| 1983 | 66° | 56° | 61° | — | — |
| 1982 | 58° | 44° | 51° | 1.12" | — |
| 1981 | 68° | 38° | 53° | — | — |
| 1980 | 67° | — | — | — | — |
| 1979 | 78° | 44° | 61° | — | — |
| 1978 | 66° | 46° | 56° | — | — |
| 1977 | 83° | 48° | 65° | — | — |
| 1976 | 82° | 40° | 61° | — | — |
| 1975 | 68° | 34° | 51° | — | — |
| 1974 | 65° | 44° | 54° | — | — |
| 1973 | 67° | 40° | 53° | — | — |
| 1972 | 78° | 38° | 58° | — | — |
| 1971 | 69° | 35° | 52° | — | — |
55 years of data from IRVINE RCH