Weather on July 4
Costa Mesa, CA
55 Years of Data
Avg High
80°F
Avg Low
63°F
Warmest
1981
83°F avg
Coldest
1975
66°F avg
About This Date
July 4th in Costa Mesa, CA typically brings warm summer weather, with average highs around 80°F and lows near 63°F. Over 55 years of records, the warmest July 4th was in 1981 (83°F average), while the coldest was 1975 (66°F) — a 17°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 July 4th in Costa Mesa, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 63° | 70° | — | — |
| 2024 | 77° | 65° | 71° | — | — |
| 2023 | 76° | 62° | 69° | — | — |
| 2022 | 76° | 64° | 70° | — | — |
| 2021 | 78° | 67° | 72° | — | — |
| 2020 | 82° | 65° | 73° | — | — |
| 2019 | 77° | 64° | 71° | — | — |
| 2018 | 78° | 66° | 72° | — | — |
| 2017 | 84° | 63° | 73° | — | — |
| 2016 | 75° | 64° | 70° | — | — |
| 2015 | 76° | 64° | 70° | — | — |
| 2014 | 83° | 68° | 75° | — | — |
| 2013 | 77° | 64° | 71° | — | — |
| 2012 | 71° | 63° | 67° | — | — |
| 2011 | 83° | 65° | 74° | — | — |
| 2010 | 73° | 63° | 68° | — | — |
| 2009 | 81° | 61° | 71° | — | — |
| 2008 | 85° | 63° | 74° | — | — |
| 2007 | 77° | 65° | 71° | — | — |
| 2006 | 84° | 69° | 77° | — | — |
| 2005 | 74° | 60° | 67° | — | — |
| 2004 | 75° | 64° | 70° | — | — |
| 2003 | 83° | 64° | 73° | — | — |
| 2002 | 71° | 62° | 67° | — | — |
| 2001 | 84° | 69° | 77° | — | — |
| 2000 | 72° | 64° | 68° | — | — |
| 1999 | 76° | 63° | 69° | — | — |
| 1998 | 77° | 62° | 70° | — | — |
| 1997 | 88° | 63° | 75° | — | — |
| 1996 | 84° | 65° | 74° | — | — |
| 1995 | 75° | 63° | 69° | — | — |
| 1994 | 79° | 64° | 71° | — | — |
| 1993 | 77° | 66° | 72° | — | — |
| 1992 | 78° | 61° | 69° | — | — |
| 1991 | 75° | 62° | 69° | — | — |
| 1990 | 84° | 62° | 73° | — | — |
| 1989 | 97° | 62° | 79° | — | — |
| 1988 | 79° | 63° | 71° | — | — |
| 1987 | 78° | 58° | 68° | — | — |
| 1986 | 78° | 65° | 71° | — | — |
| 1985 | 94° | 68° | 81° | — | — |
| 1984 | 83° | 63° | 73° | — | — |
| 1983 | 79° | 62° | 70° | — | — |
| 1982 | 78° | 60° | 69° | — | — |
| 1981warmest | 98° | 68° | 83° | — | — |
| 1980 | 84° | 61° | 72° | — | — |
| 1979 | 77° | 60° | 69° | — | — |
| 1978 | 80° | 61° | 70° | — | — |
| 1977 | 76° | 62° | 69° | — | — |
| 1976 | 81° | 63° | 72° | — | — |
| 1975coldest | 76° | 57° | 66° | — | — |
| 1974 | 83° | 58° | 70° | — | — |
| 1973 | 87° | 62° | 75° | — | — |
| 1972 | 86° | 58° | 72° | — | — |
| 1971 | 77° | 62° | 70° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP