Weather on March 12
Costa Mesa, CA
55 Years of Data
Avg High
70°F
Avg Low
51°F
Warmest
2026
75°F avg
Coldest
1990
51°F avg
About This Date
March 12th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 51°F. Over 56 years of records, the warmest March 12th was in 2026 (75°F average), while the coldest was 1990 (51°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 16% of March 12th dates historically, with the wettest March 12th recording 3.05" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for March 12th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 93° | 57° | 75° | — | — |
| 2025 | 63° | 57° | 60° | 0.08" | — |
| 2024 | 66° | 55° | 61° | — | — |
| 2023 | 66° | 56° | 61° | — | — |
| 2022 | 75° | 50° | 63° | — | — |
| 2021 | 60° | 46° | 53° | — | — |
| 2020 | 63° | 58° | 60° | 2.39" | — |
| 2019 | 66° | 53° | 60° | 0.15" | — |
| 2018 | 68° | 59° | 64° | — | — |
| 2017 | 75° | 54° | 64° | — | — |
| 2016 | 62° | 50° | 56° | — | — |
| 2015 | 88° | 54° | 71° | — | — |
| 2014 | 79° | 54° | 66° | — | — |
| 2013 | 70° | 49° | 59° | — | — |
| 2012 | 64° | 54° | 59° | — | — |
| 2011 | 65° | 52° | 58° | — | — |
| 2010 | 67° | 46° | 56° | — | — |
| 2009 | 63° | 53° | 58° | — | — |
| 2008 | 68° | 53° | 61° | — | — |
| 2007 | 85° | 55° | 70° | — | — |
| 2006 | 70° | 42° | 56° | — | — |
| 2005 | 64° | 57° | 61° | — | — |
| 2004 | 64° | 57° | 61° | — | — |
| 2003 | 69° | 52° | 60° | — | — |
| 2002 | 68° | 53° | 61° | — | — |
| 2001 | 66° | 52° | 59° | — | — |
| 2000 | 78° | 47° | 62° | — | — |
| 1999 | 64° | 45° | 54° | — | — |
| 1998 | 80° | 52° | 66° | — | — |
| 1997 | 72° | 51° | 61° | — | — |
| 1996 | 65° | 55° | 60° | 0.25" | — |
| 1995 | 67° | 56° | 61° | 0.48" | — |
| 1994 | 80° | 48° | 64° | — | — |
| 1993 | 84° | 53° | 69° | — | — |
| 1992 | 73° | 54° | 63° | — | — |
| 1991 | 69° | 44° | 57° | — | — |
| 1990coldest | 61° | 41° | 51° | 0.05" | — |
| 1989 | 73° | 54° | 63° | — | — |
| 1988 | 74° | 45° | 59° | — | — |
| 1987 | 67° | 55° | 61° | — | — |
| 1986 | 63° | 49° | 56° | 0.76" | — |
| 1985 | 66° | 46° | 56° | — | — |
| 1984 | 74° | 51° | 62° | — | — |
| 1983 | 71° | 53° | 62° | — | — |
| 1982 | 70° | 54° | 62° | 0.33" | — |
| 1981 | 68° | 54° | 61° | — | — |
| 1980 | 71° | 49° | 60° | — | — |
| 1979 | 74° | 50° | 62° | — | — |
| 1978 | 65° | 48° | 56° | 3.05" | — |
| 1977 | 73° | 44° | 59° | — | — |
| 1976 | 76° | 45° | 60° | — | — |
| 1975 | 61° | 43° | 52° | — | — |
| 1974 | 72° | 42° | 57° | — | — |
| 1973 | 62° | 43° | 52° | — | — |
| 1972 | 70° | 52° | 61° | — | — |
| 1971 | 64° | 50° | 57° | — | — |
56 years of data from SANTA ANA JOHN WAYNE AP