Weather on October 17
Costa Mesa, CA
55 Years of Data
Avg High
78°F
Avg Low
59°F
Warmest
2012
80°F avg
Coldest
1971
55°F avg
About This Date
October 17th in Costa Mesa, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 59°F. Over 55 years of records, the warmest October 17th was in 2012 (80°F average), while the coldest was 1971 (55°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 17th dates historically, with the wettest October 17th recording 2.08" of rain. 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 October 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 |
|---|---|---|---|---|---|
| 2025 | 79° | 56° | 67° | — | — |
| 2024 | 73° | 63° | 68° | — | — |
| 2023 | 74° | 64° | 69° | — | — |
| 2022 | 79° | 62° | 70° | — | — |
| 2021 | 76° | 57° | 66° | — | — |
| 2020 | 81° | 63° | 72° | — | — |
| 2019 | 76° | 63° | 69° | — | — |
| 2018 | 80° | 56° | 68° | — | — |
| 2017 | 90° | 63° | 76° | — | — |
| 2016 | 71° | 62° | 67° | 0.43" | — |
| 2015 | 80° | 70° | 75° | — | — |
| 2014 | 79° | 64° | 71° | — | — |
| 2013 | 79° | 57° | 68° | — | — |
| 2012warmest | 95° | 64° | 80° | — | — |
| 2011 | 74° | 58° | 66° | — | — |
| 2010 | 71° | 66° | 69° | 0.03" | — |
| 2009 | 84° | 63° | 73° | — | — |
| 2008 | 88° | 57° | 72° | — | — |
| 2007 | 69° | 58° | 63° | — | — |
| 2006 | 70° | 58° | 64° | 0.03" | — |
| 2005 | 66° | 58° | 62° | 0.2" | — |
| 2004 | 71° | 61° | 66° | 2.08" | — |
| 2003 | 81° | 59° | 70° | — | — |
| 2002 | 68° | 60° | 64° | — | — |
| 2001 | 72° | 58° | 65° | — | — |
| 2000 | 74° | 59° | 66° | — | — |
| 1999 | 88° | 56° | 72° | — | — |
| 1998 | 85° | 59° | 72° | — | — |
| 1997 | 94° | 60° | 77° | — | — |
| 1996 | 77° | 63° | 70° | — | — |
| 1995 | 78° | 57° | 68° | — | — |
| 1994 | 77° | 52° | 64° | — | — |
| 1993 | 71° | 57° | 64° | — | — |
| 1992 | 78° | 55° | 67° | — | — |
| 1991 | 79° | 63° | 71° | — | — |
| 1990 | 79° | 65° | 72° | — | — |
| 1989 | 76° | 57° | 66° | — | — |
| 1988 | 90° | 63° | 76° | — | — |
| 1987 | 78° | 64° | 71° | — | — |
| 1986 | 74° | 58° | 66° | — | — |
| 1985 | 75° | 61° | 68° | — | — |
| 1984 | 73° | 53° | 63° | 0.38" | — |
| 1983 | 75° | 64° | 70° | — | — |
| 1982 | 79° | 56° | 67° | — | — |
| 1981 | 83° | 50° | 66° | — | — |
| 1980 | 72° | 49° | 60° | — | — |
| 1979 | 74° | 59° | 66° | — | — |
| 1978 | 75° | 65° | 70° | — | — |
| 1977 | 78° | 60° | 69° | — | — |
| 1976 | 77° | 60° | 69° | — | — |
| 1975 | 75° | 47° | 61° | — | — |
| 1974 | 96° | 57° | 77° | — | — |
| 1973 | 90° | 51° | 70° | — | — |
| 1972 | 72° | 57° | 64° | — | — |
| 1971coldest | 64° | 46° | 55° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP