Weather on March 20
Costa Mesa, CA
55 Years of Data
Avg High
71°F
Avg Low
53°F
Warmest
2026
76°F avg
Coldest
1973
53°F avg
About This Date
March 20th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 53°F. Over 56 years of records, the warmest March 20th was in 2026 (76°F average), while the coldest was 1973 (53°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 20th dates historically, with the wettest March 20th recording 2.84" 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 20th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 87° | 64° | 76° | — | — |
| 2025 | 69° | 51° | 60° | — | — |
| 2024 | 69° | 57° | 63° | — | — |
| 2023 | 62° | 55° | 59° | 0.43" | — |
| 2022 | 73° | 56° | 64° | — | — |
| 2021 | 66° | 54° | 60° | — | — |
| 2020 | 66° | 55° | 61° | 0.03" | — |
| 2019 | 66° | 57° | 62° | — | — |
| 2018 | 70° | 55° | 62° | — | — |
| 2017 | 68° | 57° | 63° | — | — |
| 2016 | 68° | 55° | 62° | — | — |
| 2015 | 74° | 61° | 67° | — | — |
| 2014 | 70° | 58° | 64° | — | — |
| 2013 | 67° | 53° | 60° | 0.03" | — |
| 2012 | 67° | 46° | 56° | — | — |
| 2011 | 61° | 51° | 56° | 2.06" | — |
| 2010 | 75° | 51° | 63° | — | — |
| 2009 | 61° | 55° | 58° | — | — |
| 2008 | 65° | 51° | 58° | — | — |
| 2007 | 64° | 57° | 61° | — | — |
| 2006 | 62° | 49° | 55° | 0.63" | — |
| 2005 | 66° | 53° | 60° | 0.03" | — |
| 2004 | 70° | 56° | 63° | — | — |
| 2003 | 63° | 50° | 56° | — | — |
| 2002 | 73° | 46° | 60° | — | — |
| 2001 | 74° | 56° | 65° | — | — |
| 2000 | 73° | 57° | 65° | — | — |
| 1999 | 62° | 50° | 56° | 0.1" | — |
| 1998 | 73° | 53° | 63° | — | — |
| 1997 | 91° | 55° | 73° | — | — |
| 1996 | 73° | 57° | 65° | — | — |
| 1995 | 71° | 60° | 66° | — | — |
| 1994 | 72° | 56° | 64° | — | — |
| 1993 | 75° | 58° | 66° | — | — |
| 1992 | 66° | 60° | 63° | 2.84" | — |
| 1991 | 58° | 48° | 53° | 2.41" | — |
| 1990 | 90° | 53° | 71° | — | — |
| 1989 | 85° | 51° | 68° | — | — |
| 1988 | 90° | 54° | 72° | — | — |
| 1987 | 67° | 44° | 55° | — | — |
| 1986 | 83° | 47° | 65° | — | — |
| 1985 | 66° | 50° | 58° | — | — |
| 1984 | 82° | 52° | 67° | — | — |
| 1983 | 64° | 47° | 55° | — | — |
| 1982 | 71° | 41° | 56° | — | — |
| 1981 | 65° | 50° | 57° | 1.3" | — |
| 1980 | 71° | 47° | 59° | — | — |
| 1979 | 63° | 48° | 55° | 1.37" | — |
| 1978 | 70° | 57° | 63° | — | — |
| 1977 | 68° | 43° | 55° | — | — |
| 1976 | 79° | 46° | 62° | — | — |
| 1975 | 73° | 50° | 62° | — | — |
| 1974 | 63° | 55° | 59° | — | — |
| 1973coldest | 61° | 45° | 53° | 1.83" | — |
| 1972 | 70° | 55° | 62° | — | — |
| 1971 | 78° | 45° | 61° | — | — |
56 years of data from SANTA ANA JOHN WAYNE AP