Weather on March 17
Costa Mesa, CA
55 Years of Data
Avg High
70°F
Avg Low
51°F
Warmest
2026
79°F avg
Coldest
1973
50°F avg
About This Date
March 17th 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 17th was in 2026 (79°F average), while the coldest was 1973 (50°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 17th dates historically, with the wettest March 17th recording 4.01" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for March 17th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 95° | 62° | 79° | — | — |
| 2025 | 66° | 53° | 60° | — | — |
| 2024 | 67° | 52° | 59° | — | — |
| 2023 | 69° | 49° | 59° | — | — |
| 2022 | 83° | 55° | 69° | — | — |
| 2021 | 65° | 45° | 55° | — | — |
| 2020 | 63° | 51° | 57° | 0.15" | — |
| 2019 | 79° | 53° | 66° | — | — |
| 2018 | 61° | 53° | 57° | 0.2" | — |
| 2017 | 70° | 54° | 62° | — | — |
| 2016 | 73° | 56° | 64° | — | — |
| 2015 | 82° | 61° | 71° | — | — |
| 2014 | 72° | 56° | 64° | — | — |
| 2013 | 65° | 54° | 59° | — | — |
| 2012 | 58° | 47° | 52° | 1.4" | — |
| 2011 | 68° | 53° | 61° | — | — |
| 2010 | 84° | 54° | 69° | — | — |
| 2009 | 74° | 51° | 62° | — | — |
| 2008 | 69° | 45° | 57° | 0.03" | — |
| 2007 | 67° | 55° | 61° | — | — |
| 2006 | 63° | 48° | 55° | 0.08" | — |
| 2005 | 67° | 52° | 59° | — | — |
| 2004 | 71° | 54° | 62° | — | — |
| 2003 | 67° | 53° | 60° | — | — |
| 2002 | 58° | 45° | 51° | 0.56" | — |
| 2001 | 67° | 50° | 58° | — | — |
| 2000 | 68° | 56° | 62° | — | — |
| 1999 | 61° | 44° | 52° | — | — |
| 1998 | 74° | 55° | 64° | — | — |
| 1997 | 72° | 50° | 61° | — | — |
| 1996 | 69° | 54° | 61° | — | — |
| 1995 | 71° | 57° | 64° | — | — |
| 1994 | 76° | 55° | 65° | — | — |
| 1993 | 76° | 60° | 68° | — | — |
| 1992 | 70° | 53° | 61° | — | — |
| 1991 | 66° | 43° | 54° | — | — |
| 1990 | 80° | 48° | 64° | — | — |
| 1989 | 69° | 52° | 60° | — | — |
| 1988 | 80° | 47° | 63° | — | — |
| 1987 | 70° | 46° | 58° | 0.81" | — |
| 1986 | 65° | 42° | 53° | 0.03" | — |
| 1985 | 68° | 46° | 57° | — | — |
| 1984 | 67° | 50° | 58° | — | — |
| 1983 | 65° | 52° | 58° | 1.78" | — |
| 1982 | 58° | 48° | 53° | 4.01" | — |
| 1981 | 72° | 50° | 61° | — | — |
| 1980 | 77° | 49° | 63° | — | — |
| 1979 | 62° | 46° | 54° | 1.22" | — |
| 1978 | 94° | 54° | 74° | — | — |
| 1977 | 63° | 41° | 52° | 0.2" | — |
| 1976 | 80° | 56° | 68° | — | — |
| 1975 | 67° | 39° | 53° | — | — |
| 1974 | 75° | 52° | 63° | — | — |
| 1973coldest | 61° | 40° | 50° | — | — |
| 1972 | 70° | 54° | 62° | — | — |
| 1971 | 74° | 48° | 61° | — | — |
56 years of data from SANTA ANA JOHN WAYNE AP