Weather on September 3
Mission Viejo, CA
55 Years of Data
Avg High
87°F
Avg Low
63°F
Warmest
2007
88°F avg
Coldest
1973
65°F avg
About This Date
September 3rd in Mission Viejo, CA typically brings warm fall weather, with average highs around 87°F and lows near 63°F. Over 55 years of records, the warmest September 3rd was in 2007 (88°F average), while the coldest was 1973 (65°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 3rd dates historically, with the wettest September 3rd recording 0.69" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for September 3rd in Mission Viejo, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 66° | 80° | — | — |
| 2024 | 92° | 63° | 77° | — | — |
| 2023 | 79° | 60° | 69° | — | — |
| 2022 | 101° | 73° | 87° | — | — |
| 2021 | 83° | 60° | 71° | — | — |
| 2020 | 85° | 60° | 72° | — | — |
| 2019 | 92° | 70° | 81° | — | — |
| 2018 | 78° | 66° | 72° | — | — |
| 2017 | 91° | 72° | 81° | — | — |
| 2016 | 75° | 60° | 68° | — | — |
| 2015 | 77° | 61° | 69° | — | — |
| 2014 | 82° | 64° | 73° | — | — |
| 2013 | 93° | 71° | 82° | — | — |
| 2012 | 93° | 63° | 78° | — | — |
| 2011 | 85° | 56° | 70° | — | — |
| 2010 | 100° | 57° | 79° | — | — |
| 2009 | 103° | 70° | 86° | — | — |
| 2008 | 96° | 62° | 79° | — | — |
| 2007warmest | 106° | 71° | 88° | — | — |
| 2006 | 102° | 66° | 84° | — | — |
| 2005 | 87° | 55° | 71° | — | — |
| 2004 | 78° | 59° | 69° | — | — |
| 2003 | 93° | 61° | 77° | — | — |
| 2002 | 94° | 62° | 78° | — | — |
| 2001 | 85° | 65° | 75° | — | — |
| 2000 | 81° | 56° | 68° | — | — |
| 1999 | 76° | 58° | 67° | — | — |
| 1998 | 99° | 71° | 85° | 0.18" | — |
| 1997 | 88° | 70° | 79° | — | — |
| 1996 | 79° | 66° | 72° | — | — |
| 1995 | 86° | 67° | 76° | — | — |
| 1994 | 84° | 62° | 73° | — | — |
| 1993 | 86° | 66° | 76° | — | — |
| 1992 | 81° | 62° | 71° | — | — |
| 1991 | 86° | 66° | 76° | — | — |
| 1990 | 83° | 61° | 72° | — | — |
| 1989 | 85° | 58° | 71° | — | — |
| 1988 | 102° | 65° | 83° | — | — |
| 1987 | 82° | 62° | 72° | — | — |
| 1986 | 78° | 63° | 70° | — | — |
| 1985 | 74° | 62° | 68° | — | — |
| 1984 | 92° | 69° | 80° | — | — |
| 1983 | 90° | 65° | 77° | — | — |
| 1982 | 99° | 70° | 84° | — | — |
| 1981 | 80° | 63° | 71° | — | — |
| 1980 | 77° | 60° | 69° | — | — |
| 1979 | 89° | 62° | 76° | — | — |
| 1978 | 84° | 63° | 73° | — | — |
| 1977 | 82° | 62° | 72° | — | — |
| 1976 | 86° | 69° | 78° | 0.69" | — |
| 1975 | 85° | 58° | 71° | — | — |
| 1974 | 88° | 60° | 74° | — | — |
| 1973coldest | 74° | 57° | 65° | — | — |
| 1972 | 77° | 61° | 69° | 0.03" | — |
| 1971 | 82° | 61° | 71° | — | — |
55 years of data from EL TORO MCAS