Weather on December 15
Costa Mesa, CA
55 Years of Data
Avg High
69°F
Avg Low
45°F
Warmest
1980
64°F avg
Coldest
1996
46°F avg
About This Date
December 15th in Costa Mesa, CA typically brings mild winter weather, with average highs around 69°F and lows near 45°F. Over 55 years of records, the warmest December 15th was in 1980 (64°F average), while the coldest was 1996 (46°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 15th dates historically, with the wettest December 15th recording 3.81" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for December 15th in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 53° | 58° | — | — |
| 2024 | 65° | 50° | 57° | — | — |
| 2023 | 78° | 48° | 63° | — | — |
| 2022 | 64° | 46° | 55° | — | — |
| 2021 | 59° | 42° | 51° | — | — |
| 2020 | 74° | 45° | 59° | — | — |
| 2019 | 68° | 49° | 58° | — | — |
| 2018 | 70° | 48° | 59° | — | — |
| 2017 | 78° | 47° | 62° | — | — |
| 2016 | 63° | 54° | 58° | 1.12" | — |
| 2015 | 62° | 38° | 50° | — | — |
| 2014 | 67° | 50° | 58° | — | — |
| 2013 | 85° | 44° | 64° | — | — |
| 2012 | 60° | 48° | 54° | 0.03" | — |
| 2011 | 62° | 43° | 52° | 0.25" | — |
| 2010 | 68° | 60° | 64° | 0.03" | — |
| 2009 | 69° | 44° | 57° | — | — |
| 2008 | 57° | 48° | 53° | 3.81" | — |
| 2007 | 66° | 41° | 54° | — | — |
| 2006 | 62° | 50° | 56° | 0.03" | — |
| 2005 | 64° | 51° | 58° | — | — |
| 2004 | 72° | 47° | 59° | — | — |
| 2003 | 69° | 44° | 57° | 0.03" | — |
| 2002 | 64° | 55° | 60° | — | — |
| 2001 | 62° | 39° | 51° | — | — |
| 2000 | 62° | 48° | 55° | — | — |
| 1999 | 73° | 45° | 59° | — | — |
| 1998 | 83° | 39° | 61° | — | — |
| 1997 | 68° | 54° | 61° | — | — |
| 1996coldest | 76° | 17° | 46° | — | — |
| 1995 | 70° | 48° | 59° | — | — |
| 1994 | 65° | 49° | 57° | — | — |
| 1993 | 62° | 44° | 53° | — | — |
| 1992 | 62° | 43° | 52° | — | — |
| 1991 | 78° | 43° | 60° | — | — |
| 1990 | 64° | 43° | 53° | — | — |
| 1989 | 71° | 47° | 59° | — | — |
| 1988 | 59° | 53° | 56° | 0.69" | — |
| 1987 | 56° | 38° | 47° | — | — |
| 1986 | 70° | 50° | 60° | — | — |
| 1985 | 71° | 42° | 57° | — | — |
| 1984 | 61° | 40° | 50° | — | — |
| 1983 | 71° | 46° | 59° | — | — |
| 1982 | 72° | 42° | 57° | — | — |
| 1981 | 76° | 48° | 62° | — | — |
| 1980warmest | 84° | 44° | 64° | — | — |
| 1979 | 76° | 40° | 58° | — | — |
| 1978 | 75° | 42° | 59° | — | — |
| 1977 | 70° | 52° | 61° | — | — |
| 1976 | 79° | 42° | 60° | — | — |
| 1975 | 74° | 40° | 57° | — | — |
| 1974 | 74° | 44° | 59° | — | — |
| 1973 | 74° | 43° | 58° | — | — |
| 1972 | 69° | 35° | 52° | — | — |
| 1971 | 61° | 42° | 51° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP