Weather on June 21
Costa Mesa, CA
55 Years of Data
About This Date
June 21st in Costa Mesa, CA typically brings pleasant summer weather, with average highs around 78°F and lows near 62°F. Over 55 years of records, the warmest June 21st was in 2008 (83°F average), while the coldest was 1975 (63°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 4% of June 21st dates historically. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 63° | 67° | — | — |
| 2024 | 76° | 63° | 69° | — | — |
| 2023 | 75° | 60° | 68° | — | — |
| 2022 | 81° | 66° | 73° | — | — |
| 2021 | 77° | 65° | 71° | — | — |
| 2020 | 76° | 66° | 71° | — | — |
| 2019 | 72° | 62° | 67° | 0.03" | — |
| 2018 | 76° | 63° | 69° | — | — |
| 2017 | 76° | 61° | 68° | — | — |
| 2016 | 81° | 67° | 74° | — | — |
| 2015 | 76° | 65° | 70° | — | — |
| 2014 | 76° | 65° | 70° | — | — |
| 2013 | 75° | 62° | 69° | — | — |
| 2012 | 74° | 61° | 67° | — | — |
| 2011 | 79° | 63° | 71° | — | — |
| 2010 | 70° | 61° | 65° | — | — |
| 2009 | 73° | 63° | 68° | — | — |
| 2008warmest | 95° | 71° | 83° | — | — |
| 2007 | 76° | 61° | 68° | — | — |
| 2006 | 76° | 63° | 69° | — | — |
| 2005 | 82° | 62° | 72° | — | — |
| 2004 | 70° | 63° | 66° | — | — |
| 2003 | 68° | 62° | 65° | — | — |
| 2002 | 72° | 62° | 67° | — | — |
| 2001 | 79° | 62° | 70° | — | — |
| 2000 | 77° | 64° | 71° | — | — |
| 1999 | 70° | 59° | 64° | — | — |
| 1998 | 79° | 61° | 70° | — | — |
| 1997 | 77° | 62° | 70° | — | — |
| 1996 | 75° | 62° | 69° | — | — |
| 1995 | 74° | 56° | 65° | — | — |
| 1994 | 82° | 60° | 71° | — | — |
| 1993 | 77° | 63° | 70° | — | — |
| 1992 | 77° | 61° | 69° | — | — |
| 1991 | 75° | 59° | 67° | — | — |
| 1990 | 79° | 62° | 70° | — | — |
| 1989 | 86° | 60° | 73° | — | — |
| 1988 | 78° | 56° | 67° | — | — |
| 1987 | 75° | 61° | 68° | — | — |
| 1986 | 80° | 61° | 70° | — | — |
| 1985 | 75° | 60° | 68° | — | — |
| 1984 | 78° | 62° | 70° | — | — |
| 1983 | 77° | 62° | 70° | — | — |
| 1982 | 69° | 59° | 64° | — | — |
| 1981 | 86° | 64° | 75° | — | — |
| 1980 | 77° | 56° | 66° | — | — |
| 1979 | 76° | 58° | 67° | — | — |
| 1978 | 85° | 65° | 75° | — | — |
| 1977 | 75° | 62° | 69° | — | — |
| 1976 | 84° | 59° | 72° | — | — |
| 1975coldest | 73° | 54° | 63° | — | — |
| 1974 | 83° | 57° | 70° | — | — |
| 1973 | 99° | 64° | 81° | — | — |
| 1972 | 78° | 62° | 70° | 0.05" | — |
| 1971 | 87° | 62° | 75° | — | — |
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.