Weather on October 15
Costa Mesa, CA
55 Years of Data
Avg High
78°F
Avg Low
60°F
Warmest
1985
81°F avg
Coldest
1981
59°F avg
About This Date
October 15th in Costa Mesa, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 60°F. Over 55 years of records, the warmest October 15th was in 1985 (81°F average), while the coldest was 1981 (59°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 5% of October 15th dates historically, with the wettest October 15th recording 0.64" of rain. The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for October 15th 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 |
|---|---|---|---|---|---|
| 2025 | 69° | 57° | 63° | 0.2" | — |
| 2024 | 70° | 62° | 66° | — | — |
| 2023 | 84° | 60° | 72° | — | — |
| 2022 | 74° | 66° | 70° | 0.64" | — |
| 2021 | 90° | 55° | 72° | — | — |
| 2020 | 92° | 65° | 78° | — | — |
| 2019 | 83° | 59° | 71° | — | — |
| 2018 | 81° | 62° | 71° | — | — |
| 2017 | 94° | 58° | 76° | — | — |
| 2016 | 73° | 59° | 66° | — | — |
| 2015 | 80° | 71° | 76° | — | — |
| 2014 | 80° | 68° | 74° | — | — |
| 2013 | 84° | 57° | 71° | — | — |
| 2012 | 89° | 64° | 77° | — | — |
| 2011 | 73° | 62° | 68° | — | — |
| 2010 | 73° | 66° | 70° | — | — |
| 2009 | 76° | 64° | 70° | — | — |
| 2008 | 88° | 58° | 73° | — | — |
| 2007 | 64° | 59° | 62° | — | — |
| 2006 | 67° | 62° | 64° | — | — |
| 2005 | 74° | 60° | 67° | — | — |
| 2004 | 72° | 62° | 67° | — | — |
| 2003 | 73° | 60° | 67° | — | — |
| 2002 | 66° | 59° | 63° | — | — |
| 2001 | 81° | 60° | 70° | — | — |
| 2000 | 75° | 55° | 65° | — | — |
| 1999 | 71° | 60° | 66° | — | — |
| 1998 | 73° | 61° | 67° | — | — |
| 1997 | 97° | 62° | 79° | — | — |
| 1996 | 73° | 57° | 65° | — | — |
| 1995 | 75° | 62° | 69° | — | — |
| 1994 | 73° | 59° | 66° | 0.03" | — |
| 1993 | 74° | 62° | 68° | — | — |
| 1992 | 74° | 63° | 68° | — | — |
| 1991 | 78° | 61° | 69° | — | — |
| 1990 | 77° | 63° | 70° | — | — |
| 1989 | 73° | 59° | 66° | — | — |
| 1988 | 77° | 54° | 65° | — | — |
| 1987 | 75° | 63° | 69° | — | — |
| 1986 | 80° | 56° | 68° | — | — |
| 1985warmest | 91° | 72° | 81° | — | — |
| 1984 | 76° | 59° | 67° | — | — |
| 1983 | 74° | 62° | 68° | — | — |
| 1982 | 87° | 58° | 72° | — | — |
| 1981coldest | 70° | 49° | 59° | — | — |
| 1980 | 70° | 51° | 60° | — | — |
| 1979 | 78° | 58° | 68° | — | — |
| 1978 | 83° | 58° | 70° | — | — |
| 1977 | 80° | 58° | 69° | — | — |
| 1976 | 77° | 63° | 70° | — | — |
| 1975 | 88° | 54° | 71° | — | — |
| 1974 | 97° | 55° | 76° | — | — |
| 1973 | 82° | 54° | 68° | — | — |
| 1972 | 80° | 52° | 66° | — | — |
| 1971 | 71° | 59° | 65° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP