Weather on August 9
Mission Viejo, CA
55 Years of Data
Avg High
85°F
Avg Low
62°F
Warmest
2018
84°F avg
Coldest
2013
64°F avg
About This Date
August 9th in Mission Viejo, CA typically brings warm summer weather, with average highs around 85°F and lows near 62°F. Over 55 years of records, the warmest August 9th was in 2018 (84°F average), while the coldest was 2013 (64°F) — a 20°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for August 9th in Mission Viejo, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 60° | 71° | — | — |
| 2024 | 85° | 63° | 74° | — | — |
| 2023 | 83° | 64° | 73° | — | — |
| 2022 | 92° | 68° | 80° | — | — |
| 2021 | 88° | 61° | 74° | — | — |
| 2020 | 83° | 57° | 70° | — | — |
| 2019 | 84° | 56° | 70° | — | — |
| 2018warmest | 99° | 70° | 84° | — | — |
| 2017 | 83° | 60° | 71° | — | — |
| 2016 | 78° | 61° | 69° | — | — |
| 2015 | 78° | 59° | 69° | — | — |
| 2014 | 81° | 64° | 72° | — | — |
| 2013coldest | 75° | 54° | 64° | — | — |
| 2012 | 92° | 67° | 79° | — | — |
| 2011 | 78° | 56° | 67° | — | — |
| 2010 | 79° | 53° | 66° | — | — |
| 2009 | 80° | 57° | 69° | — | — |
| 2008 | 88° | 62° | 75° | — | — |
| 2007 | 82° | 60° | 71° | — | — |
| 2006 | 98° | 64° | 81° | — | — |
| 2005 | 88° | 63° | 75° | — | — |
| 2004 | 90° | 60° | 75° | — | — |
| 2003 | 96° | 64° | 80° | — | — |
| 2002 | 95° | 61° | 78° | — | — |
| 2001 | 87° | 61° | 74° | — | — |
| 2000 | 94° | 61° | 77° | — | — |
| 1999 | 79° | 55° | 67° | — | — |
| 1998 | 100° | 67° | 83° | — | — |
| 1997 | 81° | 66° | 73° | — | — |
| 1996 | 81° | 64° | 72° | — | — |
| 1995 | 84° | 63° | 73° | — | — |
| 1994 | 93° | 67° | 80° | — | — |
| 1993 | 84° | 65° | 74° | — | — |
| 1992 | 92° | 69° | 80° | — | — |
| 1991 | 83° | 61° | 72° | — | — |
| 1990 | 81° | 66° | 73° | — | — |
| 1989 | 81° | 64° | 72° | — | — |
| 1988 | 76° | 59° | 67° | — | — |
| 1987 | 78° | 60° | 69° | — | — |
| 1986 | 83° | 61° | 72° | — | — |
| 1985 | 80° | 61° | 70° | — | — |
| 1984 | 81° | 67° | 74° | — | — |
| 1983 | 94° | 72° | 83° | — | — |
| 1982 | 85° | 60° | 72° | — | — |
| 1981 | 85° | 63° | 74° | — | — |
| 1980 | 89° | 67° | 78° | — | — |
| 1979 | 89° | 66° | 78° | — | — |
| 1978 | 84° | 67° | 75° | — | — |
| 1977 | 80° | 63° | 71° | — | — |
| 1976 | 82° | 59° | 71° | — | — |
| 1975 | 82° | 62° | 72° | — | — |
| 1974 | 76° | 64° | 70° | — | — |
| 1973 | 82° | 55° | 69° | — | — |
| 1972 | 81° | 64° | 72° | — | — |
| 1971 | 93° | 70° | 81° | — | — |
55 years of data from EL TORO MCAS