Weather on May 31
Costa Mesa, CA
55 Years of Data
Avg High
74°F
Avg Low
60°F
Warmest
1992
74°F avg
Coldest
1980
60°F avg
About This Date
May 31st in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 60°F. Over 55 years of records, the warmest May 31st was in 1992 (74°F average), while the coldest was 1980 (60°F) — a 14°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for May 31st in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 66° | 72° | — | — |
| 2024 | 70° | 60° | 65° | — | — |
| 2023 | 66° | 60° | 63° | — | — |
| 2022 | 75° | 61° | 68° | — | — |
| 2021 | 72° | 62° | 67° | — | — |
| 2020 | 78° | 63° | 70° | — | — |
| 2019 | 69° | 60° | 65° | — | — |
| 2018 | 71° | 60° | 66° | — | — |
| 2017 | 67° | 61° | 64° | — | — |
| 2016 | 68° | 60° | 64° | — | — |
| 2015 | 70° | 60° | 65° | — | — |
| 2014 | 78° | 63° | 70° | — | — |
| 2013 | 75° | 62° | 69° | — | — |
| 2012 | 76° | 62° | 69° | — | — |
| 2011 | 74° | 53° | 63° | — | — |
| 2010 | 73° | 61° | 67° | — | — |
| 2009 | 69° | 59° | 64° | — | — |
| 2008 | 72° | 59° | 65° | — | — |
| 2007 | 70° | 58° | 64° | — | — |
| 2006 | 82° | 61° | 71° | — | — |
| 2005 | 73° | 61° | 67° | — | — |
| 2004 | 82° | 61° | 71° | — | — |
| 2003 | 71° | 61° | 66° | — | — |
| 2002 | 75° | 61° | 68° | — | — |
| 2001 | 76° | 62° | 69° | — | — |
| 2000 | 73° | 62° | 68° | — | — |
| 1999 | 71° | 59° | 65° | — | — |
| 1998 | 74° | 58° | 66° | — | — |
| 1997 | 82° | 64° | 73° | — | — |
| 1996 | 76° | 54° | 65° | — | — |
| 1995 | 74° | 60° | 67° | — | — |
| 1994 | 75° | 59° | 67° | — | — |
| 1993 | 77° | 63° | 70° | — | — |
| 1992warmest | 85° | 64° | 74° | — | — |
| 1991 | 69° | 52° | 60° | — | — |
| 1990 | 72° | 58° | 65° | — | — |
| 1989 | 75° | 56° | 65° | — | — |
| 1988 | 76° | 52° | 64° | — | — |
| 1987 | 80° | 57° | 69° | — | — |
| 1986 | 75° | 60° | 68° | — | — |
| 1985 | 69° | 58° | 63° | — | — |
| 1984 | 76° | 63° | 69° | — | — |
| 1983 | 70° | 59° | 64° | — | — |
| 1982 | 70° | 55° | 62° | — | — |
| 1981 | 79° | 62° | 70° | — | — |
| 1980coldest | 64° | 55° | 60° | — | — |
| 1979 | 71° | 58° | 64° | — | — |
| 1978 | 74° | 61° | 67° | — | — |
| 1977 | 77° | 62° | 70° | — | — |
| 1976 | 76° | 54° | 65° | — | — |
| 1975 | 73° | 59° | 66° | — | — |
| 1974 | 71° | 59° | 65° | — | — |
| 1973 | 72° | 59° | 65° | — | — |
| 1972 | 83° | 61° | 72° | — | — |
| 1971 | 67° | 56° | 61° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP