Weather on July 3
Costa Mesa, CA
55 Years of Data
Avg High
79°F
Avg Low
63°F
Warmest
1981
81°F avg
Coldest
1999
65°F avg
About This Date
July 3rd in Costa Mesa, CA typically brings pleasant summer weather, with average highs around 79°F and lows near 63°F. Over 55 years of records, the warmest July 3rd was in 1981 (81°F average), while the coldest was 1999 (65°F) — a 16°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 3rd in Costa Mesa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 61° | 68° | — | — |
| 2024 | 78° | 65° | 71° | — | — |
| 2023 | 74° | 63° | 68° | — | — |
| 2022 | 75° | 65° | 70° | — | — |
| 2021 | 81° | 66° | 73° | — | — |
| 2020 | 80° | 63° | 71° | — | — |
| 2019 | 75° | 64° | 70° | — | — |
| 2018 | 75° | 65° | 70° | — | — |
| 2017 | 79° | 63° | 71° | — | — |
| 2016 | 73° | 64° | 69° | — | — |
| 2015 | 77° | 65° | 71° | — | — |
| 2014 | 83° | 68° | 75° | — | — |
| 2013 | 78° | 65° | 71° | — | — |
| 2012 | 73° | 63° | 68° | — | — |
| 2011 | 76° | 64° | 70° | — | — |
| 2010 | 74° | 62° | 68° | — | — |
| 2009 | 77° | 63° | 70° | — | — |
| 2008 | 77° | 63° | 70° | — | — |
| 2007 | 81° | 65° | 73° | — | — |
| 2006 | 83° | 70° | 76° | — | — |
| 2005 | 74° | 61° | 67° | — | — |
| 2004 | 74° | 64° | 69° | — | — |
| 2003 | 84° | 66° | 75° | — | — |
| 2002 | 72° | 62° | 67° | — | — |
| 2001 | 83° | 67° | 75° | — | — |
| 2000 | 76° | 64° | 70° | — | — |
| 1999coldest | 70° | 61° | 65° | — | — |
| 1998 | 74° | 63° | 68° | — | — |
| 1997 | 91° | 62° | 77° | — | — |
| 1996 | 84° | 65° | 74° | — | — |
| 1995 | 77° | 62° | 70° | — | — |
| 1994 | 82° | 62° | 72° | — | — |
| 1993 | 78° | 66° | 72° | — | — |
| 1992 | 77° | 61° | 69° | — | — |
| 1991 | 76° | 61° | 68° | — | — |
| 1990 | 81° | 61° | 71° | — | — |
| 1989 | 86° | 60° | 73° | — | — |
| 1988 | 76° | 62° | 69° | — | — |
| 1987 | 74° | 61° | 67° | — | — |
| 1986 | 82° | 66° | 74° | — | — |
| 1985 | 93° | 61° | 77° | — | — |
| 1984 | 85° | 65° | 75° | — | — |
| 1983 | 78° | 64° | 71° | — | — |
| 1982 | 76° | 61° | 68° | — | — |
| 1981warmest | 100° | 63° | 81° | — | — |
| 1980 | 81° | 64° | 72° | — | — |
| 1979 | 72° | 60° | 66° | — | — |
| 1978 | 80° | 61° | 70° | — | — |
| 1977 | 79° | 62° | 70° | — | — |
| 1976 | 79° | 60° | 69° | — | — |
| 1975 | 77° | 58° | 67° | — | — |
| 1974 | 79° | 66° | 72° | — | — |
| 1973 | 87° | 61° | 74° | — | — |
| 1972 | 79° | 60° | 69° | — | — |
| 1971 | 76° | 59° | 67° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP