Weather on December 30
Costa Mesa, CA
55 Years of Data
Avg High
66°F
Avg Low
46°F
Warmest
1980
69°F avg
Coldest
1987
47°F avg
About This Date
December 30th in Costa Mesa, CA typically brings mild winter weather, with average highs around 66°F and lows near 46°F. Over 55 years of records, the warmest December 30th was in 1980 (69°F average), while the coldest was 1987 (47°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 30th dates historically, with the wettest December 30th recording 2.03" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for December 30th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 57° | 68° | — | — |
| 2024 | 63° | 55° | 59° | — | — |
| 2023 | 65° | 57° | 61° | 0.81" | — |
| 2022 | 62° | 56° | 59° | — | — |
| 2021 | 63° | 52° | 57° | 0.58" | — |
| 2020 | 66° | 41° | 54° | — | — |
| 2019 | 65° | 53° | 59° | — | — |
| 2018 | 63° | 42° | 52° | — | — |
| 2017 | 74° | 46° | 60° | — | — |
| 2016 | 65° | 55° | 60° | 0.23" | — |
| 2015 | 62° | 40° | 51° | — | — |
| 2014 | 61° | 47° | 54° | 0.33" | — |
| 2013 | 75° | 44° | 60° | — | — |
| 2012 | 57° | 39° | 48° | 0.18" | — |
| 2011 | 62° | 45° | 53° | — | — |
| 2010 | 57° | 42° | 50° | — | — |
| 2009 | 57° | 47° | 52° | 0.15" | — |
| 2008 | 69° | 45° | 57° | — | — |
| 2007 | 59° | 42° | 51° | — | — |
| 2006 | 66° | 43° | 54° | — | — |
| 2005 | 65° | 48° | 56° | — | — |
| 2004 | 62° | 48° | 55° | 0.03" | — |
| 2003 | 61° | 47° | 54° | — | — |
| 2002 | 62° | 44° | 53° | — | — |
| 2001 | 63° | 53° | 58° | 0.38" | — |
| 2000 | 71° | 44° | 58° | — | — |
| 1999 | 65° | 43° | 54° | — | — |
| 1998 | 76° | 41° | 58° | — | — |
| 1997 | 80° | 54° | 67° | — | — |
| 1996 | 65° | 55° | 60° | — | — |
| 1995 | 69° | 51° | 60° | — | — |
| 1994 | 63° | 42° | 52° | — | — |
| 1993 | 77° | 46° | 62° | — | — |
| 1992 | 63° | 48° | 55° | 0.25" | — |
| 1991 | 63° | 48° | 55° | 0.56" | — |
| 1990 | 66° | 45° | 55° | — | — |
| 1989 | 74° | 44° | 59° | — | — |
| 1988 | 61° | 38° | 49° | — | — |
| 1987coldest | 57° | 38° | 47° | 0.18" | — |
| 1986 | 73° | 43° | 58° | — | — |
| 1985 | 72° | 55° | 63° | — | — |
| 1984 | 68° | 43° | 55° | — | — |
| 1983 | 76° | 44° | 60° | — | — |
| 1982 | 63° | 48° | 55° | — | — |
| 1981 | 63° | 52° | 57° | 2.03" | — |
| 1980warmest | 90° | 49° | 69° | — | — |
| 1979 | 68° | 44° | 56° | — | — |
| 1978 | 67° | 41° | 54° | — | — |
| 1977 | 67° | 57° | 62° | 0.38" | — |
| 1976 | 58° | 48° | 53° | 1.22" | — |
| 1975 | — | 46° | — | — | — |
| 1974 | 61° | 38° | 49° | — | — |
| 1973 | 64° | 44° | 54° | — | — |
| 1972 | 65° | 37° | 51° | — | — |
| 1971 | 66° | 40° | 53° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP