Weather on May 15
Costa Mesa, CA
55 Years of Data
Avg High
72°F
Avg Low
58°F
Warmest
2014
86°F avg
Coldest
1984
60°F avg
About This Date
May 15th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 58°F. Over 55 years of records, the warmest May 15th was in 2014 (86°F average), while the coldest was 1984 (60°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 15th dates historically. 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 May 15th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 60° | 65° | — | — |
| 2024 | 66° | 59° | 63° | — | — |
| 2023 | 69° | 60° | 65° | — | — |
| 2022 | 77° | 62° | 70° | — | — |
| 2021 | 70° | 61° | 65° | — | — |
| 2020 | 79° | 65° | 72° | — | — |
| 2019 | 67° | 61° | 64° | — | — |
| 2018 | 68° | 58° | 63° | — | — |
| 2017 | 67° | 57° | 62° | 0.03" | — |
| 2016 | 71° | 61° | 66° | — | — |
| 2015 | 68° | 55° | 62° | 0.48" | — |
| 2014warmest | 102° | 69° | 86° | — | — |
| 2013 | 70° | 61° | 65° | — | — |
| 2012 | 73° | 57° | 65° | — | — |
| 2011 | 65° | 56° | 60° | 0.18" | — |
| 2010 | 70° | 58° | 64° | — | — |
| 2009 | 70° | 60° | 65° | — | — |
| 2008 | 77° | 60° | 69° | — | — |
| 2007 | 69° | 58° | 63° | — | — |
| 2006 | 71° | 62° | 67° | — | — |
| 2005 | 74° | 61° | 67° | — | — |
| 2004 | 77° | 60° | 69° | — | — |
| 2003 | 68° | 54° | 61° | — | — |
| 2002 | 67° | 58° | 62° | — | — |
| 2001 | 70° | 59° | 64° | — | — |
| 2000 | 72° | 56° | 64° | — | — |
| 1999 | 68° | 55° | 62° | — | — |
| 1998 | 73° | 59° | 66° | — | — |
| 1997 | 84° | 62° | 73° | — | — |
| 1996 | 79° | 64° | 71° | — | — |
| 1995 | 71° | 54° | 62° | 0.13" | — |
| 1994 | 69° | 59° | 64° | — | — |
| 1993 | 81° | 62° | 71° | — | — |
| 1992 | 75° | 63° | 69° | — | — |
| 1991 | 77° | 52° | 64° | — | — |
| 1990 | 72° | 59° | 65° | — | — |
| 1989 | 67° | 57° | 62° | — | — |
| 1988 | 73° | 58° | 65° | — | — |
| 1987 | 70° | 59° | 64° | — | — |
| 1986 | 70° | 59° | 64° | — | — |
| 1985 | 74° | 55° | 64° | — | — |
| 1984coldest | 69° | 51° | 60° | — | — |
| 1983 | 72° | 55° | 63° | — | — |
| 1982 | 73° | 55° | 64° | — | — |
| 1981 | 68° | 57° | 63° | — | — |
| 1980 | 68° | 54° | 61° | — | — |
| 1979 | 75° | 57° | 66° | — | — |
| 1978 | 78° | 63° | 70° | — | — |
| 1977 | 68° | 56° | 62° | — | — |
| 1976 | 75° | 58° | 66° | — | — |
| 1975 | 69° | 56° | 62° | — | — |
| 1974 | 67° | 56° | 61° | — | — |
| 1973 | 75° | 57° | 66° | — | — |
| 1972 | 84° | 58° | 71° | — | — |
| 1971 | 70° | 56° | 63° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP