Weather on March 18
Costa Mesa, CA
55 Years of Data
Avg High
71°F
Avg Low
51°F
Warmest
2026
77°F avg
Coldest
2012
51°F avg
About This Date
March 18th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 51°F. Over 56 years of records, the warmest March 18th was in 2026 (77°F average), while the coldest was 2012 (51°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of March 18th dates historically, with the wettest March 18th recording 2.03" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 18th in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 64° | 77° | — | — |
| 2025 | 67° | 49° | 58° | — | — |
| 2024 | 71° | 53° | 62° | 0.08" | — |
| 2023 | 74° | 51° | 62° | — | — |
| 2022 | 77° | 56° | 66° | — | — |
| 2021 | 65° | 49° | 57° | — | — |
| 2020 | 63° | 49° | 56° | — | — |
| 2019 | 73° | 53° | 63° | — | — |
| 2018 | 62° | 47° | 54° | — | — |
| 2017 | 70° | 56° | 63° | — | — |
| 2016 | 69° | 57° | 63° | — | — |
| 2015 | 71° | 61° | 66° | — | — |
| 2014 | 70° | 57° | 63° | — | — |
| 2013 | 63° | 54° | 58° | — | — |
| 2012coldest | 56° | 46° | 51° | — | — |
| 2011 | 66° | 49° | 57° | — | — |
| 2010 | 72° | 54° | 63° | — | — |
| 2009 | 78° | 53° | 66° | — | — |
| 2008 | 68° | 47° | 57° | — | — |
| 2007 | 62° | 55° | 59° | — | — |
| 2006 | 60° | 48° | 54° | 0.1" | — |
| 2005 | 75° | 50° | 63° | 0.2" | — |
| 2004 | 66° | 57° | 62° | — | — |
| 2003 | 68° | 48° | 58° | — | — |
| 2002 | 63° | 44° | 53° | — | — |
| 2001 | 75° | 52° | 63° | — | — |
| 2000 | 73° | 51° | 62° | — | — |
| 1999 | 62° | 51° | 57° | — | — |
| 1998 | 75° | 59° | 67° | — | — |
| 1997 | 83° | 50° | 66° | — | — |
| 1996 | 73° | 56° | 64° | — | — |
| 1995 | 73° | 60° | 67° | — | — |
| 1994 | 76° | 56° | 66° | — | — |
| 1993 | 72° | 57° | 64° | — | — |
| 1992 | 67° | 51° | 59° | — | — |
| 1991 | 70° | 50° | 60° | — | — |
| 1990 | 79° | 46° | 62° | — | — |
| 1989 | 73° | 47° | 60° | — | — |
| 1988 | 85° | 48° | 66° | — | — |
| 1987 | 67° | 49° | 58° | — | — |
| 1986 | 74° | 45° | 59° | — | — |
| 1985 | 66° | 46° | 56° | 0.33" | — |
| 1984 | 81° | 49° | 65° | — | — |
| 1983 | 63° | 49° | 56° | 1.65" | — |
| 1982 | 59° | 44° | 52° | 2.03" | — |
| 1981 | 72° | 51° | 61° | — | — |
| 1980 | 73° | 51° | 62° | — | — |
| 1979 | 64° | 47° | 55° | — | — |
| 1978 | 88° | 64° | 76° | — | — |
| 1977 | 67° | 43° | 55° | — | — |
| 1976 | 74° | 52° | 63° | — | — |
| 1975 | 71° | 44° | 58° | — | — |
| 1974 | 70° | 57° | 63° | — | — |
| 1973 | 70° | 43° | 56° | — | — |
| 1972 | 67° | 52° | 59° | — | — |
| 1971 | 75° | 46° | 61° | — | — |
56 years of data from SANTA ANA JOHN WAYNE AP