Weather on October 31
Costa Mesa, CA
55 Years of Data
About This Date
October 31st in Costa Mesa, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 55°F. Over 55 years of records, the warmest October 31st was in 2008 (74°F average), while the coldest was 1971 (54°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 31st dates historically, with the wettest October 31st recording 1.7" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 61° | 66° | — | — |
| 2024 | 72° | 53° | 62° | — | — |
| 2023 | 89° | 54° | 71° | — | — |
| 2022 | 78° | 57° | 68° | — | — |
| 2021 | 70° | 61° | 65° | — | — |
| 2020 | 76° | 57° | 66° | — | — |
| 2019 | 80° | 47° | 63° | — | — |
| 2018 | 79° | 58° | 68° | — | — |
| 2017 | 70° | 63° | 66° | — | — |
| 2016 | 70° | 58° | 64° | — | — |
| 2015 | 84° | 59° | 72° | — | — |
| 2014 | 73° | 63° | 68° | — | — |
| 2013 | 77° | 51° | 64° | — | — |
| 2012 | 72° | 59° | 65° | — | — |
| 2011 | 74° | 53° | 63° | — | — |
| 2010 | 74° | 58° | 66° | — | — |
| 2009 | 79° | 50° | 64° | — | — |
| 2008warmest | 84° | 65° | 74° | — | — |
| 2007 | 72° | 55° | 63° | 0.03" | — |
| 2006 | 68° | 59° | 64° | — | — |
| 2005 | 91° | 53° | 72° | — | — |
| 2004 | 69° | 51° | 60° | — | — |
| 2003 | 66° | 55° | 61° | 0.15" | — |
| 2002 | 66° | 54° | 60° | — | — |
| 2001 | 68° | 57° | 63° | — | — |
| 2000 | 67° | 52° | 59° | — | — |
| 1999 | 87° | 53° | 70° | — | — |
| 1998 | 73° | 54° | 63° | — | — |
| 1997 | 83° | 55° | 69° | — | — |
| 1996 | 64° | 47° | 55° | — | — |
| 1995 | 69° | 59° | 64° | — | — |
| 1994 | 80° | 52° | 66° | — | — |
| 1993 | 79° | 60° | 69° | — | — |
| 1992 | 75° | 56° | 65° | 0.05" | — |
| 1991 | 76° | 47° | 61° | — | — |
| 1990 | 75° | 55° | 65° | — | — |
| 1989 | 79° | 51° | 65° | — | — |
| 1988 | 81° | 55° | 68° | — | — |
| 1987 | 69° | 58° | 63° | 1.7" | — |
| 1986 | 73° | 61° | 67° | — | — |
| 1985 | 75° | 69° | 72° | — | — |
| 1984 | 71° | 55° | 63° | — | — |
| 1983 | 75° | 63° | 69° | — | — |
| 1982 | 73° | 56° | 64° | 0.15" | — |
| 1981 | 86° | 48° | 67° | — | — |
| 1980 | 87° | 59° | 73° | — | — |
| 1979 | 72° | 50° | 61° | — | — |
| 1978 | 72° | 54° | 63° | — | — |
| 1977 | 73° | 52° | 62° | — | — |
| 1976 | 81° | 45° | 63° | — | — |
| 1975 | 70° | 49° | 59° | — | — |
| 1974 | 69° | 49° | 59° | 0.03" | — |
| 1973 | 89° | 48° | 69° | — | — |
| 1972 | 71° | 44° | 58° | — | — |
| 1971coldest | 67° | 41° | 54° | — | — |
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.