Weather on August 12
Costa Mesa, CA
55 Years of Data
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° | — | — |
Costa Mesa, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Costa Mesa, CA Monthly Precipitation
Average rainfall per month, in inches.
Costa Mesa, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Costa Mesa, CA
Most pleasant months in Costa Mesa, CA: June, July.