Weather on May 31
Costa Mesa, CA
55 Years of Data
About This Date
May 31st in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 60°F. Over 56 years of records, the warmest May 31st was in 1992 (74°F average), while the coldest was 1980 (60°F) — a 14°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for May 31st in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 74° | 61° | 67° | — | — |
| 2025 | 79° | 66° | 72° | — | — |
| 2024 | 70° | 60° | 65° | — | — |
| 2023 | 66° | 60° | 63° | — | — |
| 2022 | 75° | 61° | 68° | — | — |
| 2021 | 72° | 62° | 67° | — | — |
| 2020 | 78° | 63° | 70° | — | — |
| 2019 | 69° | 60° | 65° | — | — |
| 2018 | 71° | 60° | 66° | — | — |
| 2017 | 67° | 61° | 64° | — | — |
| 2016 | 68° | 60° | 64° | — | — |
| 2015 | 70° | 60° | 65° | — | — |
| 2014 | 78° | 63° | 70° | — | — |
| 2013 | 75° | 62° | 69° | — | — |
| 2012 | 76° | 62° | 69° | — | — |
| 2011 | 74° | 53° | 63° | — | — |
| 2010 | 73° | 61° | 67° | — | — |
| 2009 | 69° | 59° | 64° | — | — |
| 2008 | 72° | 59° | 65° | — | — |
| 2007 | 70° | 58° | 64° | — | — |
| 2006 | 82° | 61° | 71° | — | — |
| 2005 | 73° | 61° | 67° | — | — |
| 2004 | 82° | 61° | 71° | — | — |
| 2003 | 71° | 61° | 66° | — | — |
| 2002 | 75° | 61° | 68° | — | — |
| 2001 | 76° | 62° | 69° | — | — |
| 2000 | 73° | 62° | 68° | — | — |
| 1999 | 71° | 59° | 65° | — | — |
| 1998 | 74° | 58° | 66° | — | — |
| 1997 | 82° | 64° | 73° | — | — |
| 1996 | 76° | 54° | 65° | — | — |
| 1995 | 74° | 60° | 67° | — | — |
| 1994 | 75° | 59° | 67° | — | — |
| 1993 | 77° | 63° | 70° | — | — |
| 1992warmest | 85° | 64° | 74° | — | — |
| 1991 | 69° | 52° | 60° | — | — |
| 1990 | 72° | 58° | 65° | — | — |
| 1989 | 75° | 56° | 65° | — | — |
| 1988 | 76° | 52° | 64° | — | — |
| 1987 | 80° | 57° | 69° | — | — |
| 1986 | 75° | 60° | 68° | — | — |
| 1985 | 69° | 58° | 63° | — | — |
| 1984 | 76° | 63° | 69° | — | — |
| 1983 | 70° | 59° | 64° | — | — |
| 1982 | 70° | 55° | 62° | — | — |
| 1981 | 79° | 62° | 70° | — | — |
| 1980coldest | 64° | 55° | 60° | — | — |
| 1979 | 71° | 58° | 64° | — | — |
| 1978 | 74° | 61° | 67° | — | — |
| 1977 | 77° | 62° | 70° | — | — |
| 1976 | 76° | 54° | 65° | — | — |
| 1975 | 73° | 59° | 66° | — | — |
| 1974 | 71° | 59° | 65° | — | — |
| 1973 | 72° | 59° | 65° | — | — |
| 1972 | 83° | 61° | 72° | — | — |
| 1971 | 67° | 56° | 61° | — | — |
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: January, February, March, April, May, June, July, October, November, December.
What to expect on May 31st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
May 31st outlook →