Weather on September 4
Mission Viejo, CA
55 Years of Data
Avg High
88°F
Avg Low
64°F
Warmest
1988
95°F avg
Coldest
1973
63°F avg
About This Date
September 4th in Mission Viejo, CA typically brings warm fall weather, with average highs around 88°F and lows near 64°F. Over 55 years of records, the warmest September 4th was in 1988 (95°F average), while the coldest was 1973 (63°F) — a 32°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for September 4th in Mission Viejo, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 63° | 79° | — | — |
| 2024 | 102° | 65° | 83° | — | — |
| 2023 | 76° | 59° | 67° | — | — |
| 2022 | 100° | 73° | 87° | — | — |
| 2021 | 99° | 61° | 80° | — | — |
| 2020 | 94° | 62° | 78° | — | — |
| 2019 | 101° | 73° | 87° | — | — |
| 2018 | 80° | 66° | 73° | — | — |
| 2017 | 73° | 65° | 69° | — | — |
| 2016 | 75° | 60° | 68° | — | — |
| 2015 | 77° | 60° | 69° | — | — |
| 2014 | 80° | 62° | 71° | — | — |
| 2013 | 97° | 71° | 84° | — | — |
| 2012 | 97° | 64° | 80° | — | — |
| 2011 | 86° | 57° | 72° | — | — |
| 2010 | 103° | 59° | 81° | — | — |
| 2009 | 97° | 68° | 82° | — | — |
| 2008 | 95° | 65° | 80° | — | — |
| 2007 | 99° | 69° | 84° | — | — |
| 2006 | 101° | 68° | 84° | — | — |
| 2005 | 89° | 57° | 73° | — | — |
| 2004 | 93° | 56° | 74° | — | — |
| 2003 | 99° | 64° | 81° | — | — |
| 2002 | 90° | 61° | 75° | — | — |
| 2001 | 87° | 63° | 75° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 80° | 58° | 69° | — | — |
| 1998 | 72° | 68° | 70° | — | — |
| 1997 | 92° | 72° | 82° | — | — |
| 1996 | 78° | 65° | 71° | — | — |
| 1995 | 87° | 66° | 77° | — | — |
| 1994 | 86° | 62° | 74° | — | — |
| 1993 | 87° | 66° | 77° | — | — |
| 1992 | 80° | 61° | 70° | — | — |
| 1991 | 79° | 66° | 72° | — | — |
| 1990 | 87° | 62° | 75° | — | — |
| 1989 | 85° | 59° | 72° | — | — |
| 1988warmest | 109° | 80° | 95° | — | — |
| 1987 | 79° | 62° | 70° | — | — |
| 1986 | 80° | 60° | 70° | — | — |
| 1985 | 71° | 62° | 67° | — | — |
| 1984 | 98° | 70° | 84° | — | — |
| 1983 | 85° | 65° | 75° | — | — |
| 1982 | 95° | 67° | 81° | — | — |
| 1981 | 80° | 66° | 73° | — | — |
| 1980 | 78° | 60° | 69° | — | — |
| 1979 | 84° | 57° | 71° | — | — |
| 1978 | 89° | 68° | 79° | — | — |
| 1977 | 85° | 60° | 72° | — | — |
| 1976 | 87° | 67° | 77° | — | — |
| 1975 | 86° | 60° | 73° | — | — |
| 1974 | 89° | 60° | 75° | — | — |
| 1973coldest | 68° | 58° | 63° | — | — |
| 1972 | 90° | 64° | 77° | — | — |
| 1971 | 85° | 57° | 71° | — | — |
55 years of data from EL TORO MCAS