Weather on May 9
Costa Mesa, CA
55 Years of Data
Avg High
73°F
Avg Low
57°F
Warmest
1993
75°F avg
Coldest
1977
56°F avg
About This Date
May 9th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 57°F. Over 55 years of records, the warmest May 9th was in 1993 (75°F average), while the coldest was 1977 (56°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 9th dates historically, with the wettest May 9th recording 1.65" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for May 9th in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 60° | 72° | — | — |
| 2024 | 71° | 60° | 66° | — | — |
| 2023 | 69° | 58° | 63° | — | — |
| 2022 | 70° | 58° | 64° | — | — |
| 2021 | 69° | 60° | 65° | — | — |
| 2020 | 78° | 65° | 71° | — | — |
| 2019 | 67° | 60° | 63° | — | — |
| 2018 | 72° | 59° | 65° | — | — |
| 2017 | 70° | 59° | 64° | — | — |
| 2016 | 69° | 57° | 63° | — | — |
| 2015 | 66° | 56° | 61° | — | — |
| 2014 | 73° | 59° | 66° | — | — |
| 2013 | 70° | 57° | 63° | — | — |
| 2012 | 73° | 56° | 64° | — | — |
| 2011 | 66° | 56° | 61° | 0.13" | — |
| 2010 | 67° | 57° | 62° | — | — |
| 2009 | 69° | 60° | 65° | — | — |
| 2008 | 66° | 58° | 62° | — | — |
| 2007 | 79° | 57° | 68° | — | — |
| 2006 | 70° | 59° | 64° | — | — |
| 2005 | 69° | 58° | 63° | — | — |
| 2004 | 77° | 59° | 68° | — | — |
| 2003 | 65° | 54° | 59° | — | — |
| 2002 | 70° | 55° | 62° | — | — |
| 2001 | 73° | 58° | 65° | — | — |
| 2000 | 72° | 59° | 65° | — | — |
| 1999 | 66° | 56° | 61° | — | — |
| 1998 | 69° | 59° | 64° | — | — |
| 1997 | 81° | 61° | 71° | — | — |
| 1996 | 77° | 58° | 67° | — | — |
| 1995 | 71° | 51° | 61° | — | — |
| 1994 | 70° | 55° | 62° | — | — |
| 1993warmest | 92° | 59° | 75° | — | — |
| 1992 | 70° | 62° | 66° | — | — |
| 1991 | 72° | 56° | 64° | — | — |
| 1990 | 71° | 59° | 65° | — | — |
| 1989 | 76° | 60° | 68° | — | — |
| 1988 | 77° | 51° | 64° | — | — |
| 1987 | 76° | 62° | 69° | — | — |
| 1986 | 80° | 53° | 67° | — | — |
| 1985 | 65° | 55° | 60° | — | — |
| 1984 | 88° | 58° | 73° | — | — |
| 1983 | 73° | 57° | 65° | — | — |
| 1982 | 64° | 55° | 60° | — | — |
| 1981 | 85° | 56° | 70° | — | — |
| 1980 | 68° | 58° | 63° | — | — |
| 1979 | 70° | 48° | 59° | — | — |
| 1978 | 85° | 57° | 71° | — | — |
| 1977coldest | 60° | 52° | 56° | 1.65" | — |
| 1976 | 74° | 59° | 66° | — | — |
| 1975 | 77° | 53° | 65° | — | — |
| 1974 | 68° | 58° | 63° | — | — |
| 1973 | 77° | 53° | 65° | — | — |
| 1972 | 71° | 52° | 61° | — | — |
| 1971 | 71° | 50° | 61° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP