Weather on August 12
Costa Mesa, CA
55 Years of Data
Avg High
82°F
Avg Low
66°F
Warmest
1994
85°F avg
Coldest
2009
69°F avg
About This Date
August 12th in Costa Mesa, CA typically brings warm summer weather, with average highs around 82°F and lows near 66°F. Over 55 years of records, the warmest August 12th was in 1994 (85°F average), while the coldest was 2009 (69°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 12th dates historically, with the wettest August 12th recording 1.6" of rain. 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 August 12th in Costa Mesa, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 66° | 71° | — | — |
| 2024 | 83° | 69° | 76° | — | — |
| 2023 | 79° | 68° | 73° | — | — |
| 2022 | 87° | 70° | 78° | — | — |
| 2021 | 90° | 70° | 80° | — | — |
| 2020 | 80° | 63° | 71° | — | — |
| 2019 | 77° | 66° | 72° | — | — |
| 2018 | 83° | 71° | 77° | — | — |
| 2017 | 78° | 67° | 72° | — | — |
| 2016 | 79° | 67° | 73° | — | — |
| 2015 | 84° | 64° | 74° | — | — |
| 2014 | 82° | 70° | 76° | — | — |
| 2013 | 77° | 65° | 71° | — | — |
| 2012 | 92° | 73° | 82° | — | — |
| 2011 | 76° | 65° | 70° | — | — |
| 2010 | 76° | 62° | 69° | — | — |
| 2009coldest | 75° | 63° | 69° | — | — |
| 2008 | 79° | 65° | 72° | — | — |
| 2007 | 80° | 65° | 72° | — | — |
| 2006 | 80° | 67° | 73° | — | — |
| 2005 | 75° | 66° | 71° | — | — |
| 2004 | 79° | 66° | 72° | — | — |
| 2003 | 86° | 68° | 77° | — | — |
| 2002 | 75° | 64° | 70° | — | — |
| 2001 | 77° | 66° | 72° | — | — |
| 2000 | 84° | 65° | 74° | — | — |
| 1999 | 78° | 62° | 70° | — | — |
| 1998 | 92° | 68° | 80° | — | — |
| 1997 | 81° | 63° | 72° | — | — |
| 1996 | 90° | 66° | 78° | — | — |
| 1995 | 89° | 66° | 78° | — | — |
| 1994warmest | 100° | 70° | 85° | — | — |
| 1993 | 80° | 64° | 72° | — | — |
| 1992 | 87° | 68° | 78° | — | — |
| 1991 | 98° | 67° | 82° | — | — |
| 1990 | 87° | 66° | 77° | — | — |
| 1989 | 85° | 64° | 74° | — | — |
| 1988 | 79° | 64° | 71° | — | — |
| 1987 | 80° | 63° | 71° | — | — |
| 1986 | 83° | 64° | 73° | — | — |
| 1985 | 79° | 65° | 72° | — | — |
| 1984 | 87° | 67° | 77° | — | — |
| 1983 | 93° | 66° | 80° | — | — |
| 1982 | 78° | 62° | 70° | — | — |
| 1981 | 81° | 66° | 73° | — | — |
| 1980 | 84° | 69° | 77° | — | — |
| 1979 | 78° | 66° | 72° | — | — |
| 1978 | 80° | 66° | 73° | — | — |
| 1977 | 82° | 63° | 72° | — | — |
| 1976 | 87° | 58° | 72° | — | — |
| 1975 | 79° | 63° | 71° | — | — |
| 1974 | 78° | 64° | 71° | — | — |
| 1973 | 79° | 64° | 71° | — | — |
| 1972 | 81° | 68° | 74° | 1.6" | — |
| 1971 | 87° | 63° | 75° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP