Weather on June 30
Costa Mesa, CA
55 Years of Data
Avg High
80°F
Avg Low
62°F
Warmest
1985
83°F avg
Coldest
1982
65°F avg
About This Date
June 30th in Costa Mesa, CA typically brings warm summer weather, with average highs around 80°F and lows near 62°F. Over 55 years of records, the warmest June 30th was in 1985 (83°F average), while the coldest was 1982 (65°F) — a 18°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 June 30th in Costa Mesa, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 64° | 71° | — | — |
| 2024 | 79° | 63° | 71° | — | — |
| 2023 | 78° | 63° | 70° | — | — |
| 2022 | 81° | 66° | 73° | — | — |
| 2021 | 78° | 66° | 72° | — | — |
| 2020 | 76° | 65° | 70° | — | — |
| 2019 | 81° | 64° | 72° | — | — |
| 2018 | 75° | 63° | 69° | — | — |
| 2017 | 74° | 63° | 68° | — | — |
| 2016 | 76° | 66° | 71° | — | — |
| 2015 | 89° | 65° | 77° | — | — |
| 2014 | 78° | 68° | 73° | — | — |
| 2013 | 84° | 68° | 76° | — | — |
| 2012 | 78° | 61° | 69° | — | — |
| 2011 | 80° | 61° | 70° | — | — |
| 2010 | 78° | 64° | 71° | — | — |
| 2009 | 77° | 61° | 69° | — | — |
| 2008 | 83° | 63° | 73° | — | — |
| 2007 | 78° | 63° | 70° | — | — |
| 2006 | 85° | 65° | 75° | — | — |
| 2005 | 73° | 59° | 66° | — | — |
| 2004 | 72° | 64° | 68° | — | — |
| 2003 | 78° | 62° | 70° | — | — |
| 2002 | 72° | 62° | 67° | — | — |
| 2001 | 78° | 63° | 70° | — | — |
| 2000 | 78° | 65° | 71° | — | — |
| 1999 | 75° | 61° | 68° | — | — |
| 1998 | 81° | 61° | 71° | — | — |
| 1997 | 78° | 62° | 70° | — | — |
| 1996 | 96° | 65° | 80° | — | — |
| 1995 | 80° | 60° | 70° | — | — |
| 1994 | 81° | 62° | 71° | — | — |
| 1993 | 82° | 63° | 72° | — | — |
| 1992 | 77° | 60° | 69° | — | — |
| 1991 | 81° | 59° | 70° | — | — |
| 1990 | 82° | 63° | 72° | — | — |
| 1989 | 78° | 58° | 68° | — | — |
| 1988 | 78° | 64° | 71° | — | — |
| 1987 | 75° | 59° | 67° | — | — |
| 1986 | 89° | 65° | 77° | — | — |
| 1985warmest | 103° | 63° | 83° | — | — |
| 1984 | 82° | 64° | 73° | — | — |
| 1983 | 75° | 64° | 70° | — | — |
| 1982coldest | 72° | 59° | 65° | — | — |
| 1981 | 82° | 61° | 71° | — | — |
| 1980 | 86° | 65° | 75° | — | — |
| 1979 | 83° | 62° | 72° | — | — |
| 1978 | 79° | 59° | 69° | — | — |
| 1977 | 81° | 61° | 71° | — | — |
| 1976 | 90° | 63° | 76° | — | — |
| 1975 | 82° | 58° | 70° | — | — |
| 1974 | 85° | 56° | 70° | — | — |
| 1973 | 81° | 63° | 72° | — | — |
| 1972 | 81° | 62° | 71° | — | — |
| 1971 | 77° | 58° | 67° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP