Weather on March 18
Costa Mesa, CA
55 Years of Data
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° | — | — |
Costa Mesa, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Costa Mesa, CA Monthly Precipitation
Average rainfall per month, in inches.
Costa Mesa, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Costa Mesa, CA
Most pleasant months in Costa Mesa, CA: June, July.