Weather on October 17
Costa Mesa, CA
55 Years of Data
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.
| 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° | — | — |
Costa Mesa, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Costa Mesa, CA Monthly Precipitation
Average rainfall per month, in inches.
Costa Mesa, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Costa Mesa, CA
Most pleasant months in Costa Mesa, CA: June, July.