Weather on June 20
Costa Mesa, CA
55 Years of Data
Avg High
78°F
Avg Low
62°F
Warmest
1973
85°F avg
Coldest
1975
64°F avg
About This Date
June 20th 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 20th was in 1973 (85°F average), while the coldest was 1975 (64°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 66° | 70° | — | — |
| 2024 | 76° | 65° | 70° | — | — |
| 2023 | 75° | 63° | 69° | — | — |
| 2022 | 88° | 63° | 75° | — | — |
| 2021 | 74° | 65° | 69° | — | — |
| 2020 | 77° | 66° | 72° | — | — |
| 2019 | 68° | 63° | 65° | — | — |
| 2018 | 74° | 63° | 68° | — | — |
| 2017 | 77° | 63° | 70° | — | — |
| 2016 | 96° | 66° | 81° | — | — |
| 2015 | 77° | 62° | 70° | — | — |
| 2014 | 80° | 63° | 71° | — | — |
| 2013 | 76° | 61° | 68° | — | — |
| 2012 | 72° | 62° | 67° | — | — |
| 2011 | 75° | 61° | 68° | — | — |
| 2010 | 75° | 63° | 69° | — | — |
| 2009 | 72° | 64° | 68° | — | — |
| 2008 | 94° | 65° | 79° | — | — |
| 2007 | 77° | 61° | 69° | — | — |
| 2006 | 77° | 63° | 70° | — | — |
| 2005 | 80° | 59° | 70° | — | — |
| 2004 | 73° | 64° | 69° | — | — |
| 2003 | 70° | 61° | 65° | — | — |
| 2002 | 72° | 62° | 67° | — | — |
| 2001 | 79° | 62° | 70° | — | — |
| 2000 | 77° | 66° | 72° | — | — |
| 1999 | 71° | 59° | 65° | — | — |
| 1998 | 76° | 62° | 69° | — | — |
| 1997 | 79° | 65° | 72° | — | — |
| 1996 | 75° | 62° | 69° | — | — |
| 1995 | 77° | 58° | 67° | — | — |
| 1994 | 80° | 62° | 71° | — | — |
| 1993 | 80° | 64° | 72° | — | — |
| 1992 | 75° | 60° | 68° | — | — |
| 1991 | 74° | 58° | 66° | — | — |
| 1990 | 79° | 62° | 70° | — | — |
| 1989 | 86° | 63° | 74° | — | — |
| 1988 | 75° | 60° | 68° | — | — |
| 1987 | 73° | 61° | 67° | — | — |
| 1986 | 80° | 60° | 70° | — | — |
| 1985 | 76° | 62° | 69° | — | — |
| 1984 | 80° | 60° | 70° | — | — |
| 1983 | 76° | 61° | 68° | — | — |
| 1982 | 71° | 62° | 67° | — | — |
| 1981 | 84° | 64° | 74° | — | — |
| 1980 | 77° | 56° | 66° | — | — |
| 1979 | 76° | 57° | 66° | — | — |
| 1978 | 88° | 60° | 74° | — | — |
| 1977 | 75° | 61° | 68° | — | — |
| 1976 | 82° | 61° | 71° | — | — |
| 1975coldest | 72° | 57° | 64° | — | — |
| 1974 | 83° | 57° | 70° | — | — |
| 1973warmest | 108° | 62° | 85° | — | — |
| 1972 | 81° | 60° | 70° | — | — |
| 1971 | 87° | 60° | 74° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP