Weather on September 1
Mission Viejo, CA
55 Years of Data
About This Date
September 1st in Mission Viejo, CA typically brings warm fall weather, with average highs around 86°F and lows near 63°F. Over 55 years of records, the warmest September 1st was in 2002 (89°F average), while the coldest was 1973 (67°F) — a 22°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 September 1st in Mission Viejo, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 64° | 80° | — | — |
| 2024 | 87° | 60° | 74° | — | — |
| 2023 | 86° | 60° | 73° | — | — |
| 2022 | 100° | 70° | 85° | — | — |
| 2021 | 75° | 63° | 69° | — | — |
| 2020 | 80° | 61° | 70° | — | — |
| 2019 | 86° | 63° | 74° | — | — |
| 2018 | 78° | 61° | 69° | — | — |
| 2017 | 103° | 72° | 87° | — | — |
| 2016 | 81° | 61° | 71° | — | — |
| 2015 | 82° | 63° | 72° | — | — |
| 2014 | 84° | 61° | 72° | — | — |
| 2013 | 92° | 70° | 81° | — | — |
| 2012 | 94° | 64° | 79° | — | — |
| 2011 | 82° | 57° | 70° | — | — |
| 2010 | 86° | 57° | 72° | — | — |
| 2009 | 94° | 67° | 80° | — | — |
| 2008 | 83° | 61° | 72° | — | — |
| 2007 | 103° | 70° | 86° | — | — |
| 2006 | 98° | 60° | 79° | — | — |
| 2005 | 82° | 54° | 68° | — | — |
| 2004 | 95° | 66° | 81° | — | — |
| 2003 | 84° | 61° | 72° | — | — |
| 2002warmest | 107° | 72° | 89° | — | — |
| 2001 | 87° | 60° | 74° | — | — |
| 2000 | 77° | 58° | 67° | — | — |
| 1999 | 78° | 57° | 68° | — | — |
| 1998 | 94° | 72° | 83° | — | — |
| 1997 | 85° | 64° | 74° | — | — |
| 1996 | 86° | 64° | 75° | — | — |
| 1995 | 88° | 65° | 76° | — | — |
| 1994 | 82° | 66° | 74° | — | — |
| 1993 | 84° | 66° | 75° | — | — |
| 1992 | 80° | 65° | 72° | — | — |
| 1991 | 87° | 64° | 76° | — | — |
| 1990 | 80° | 62° | 71° | — | — |
| 1989 | 81° | 58° | 69° | — | — |
| 1988 | 78° | 61° | 69° | — | — |
| 1987 | 104° | 62° | 83° | — | — |
| 1986 | 78° | 64° | 71° | — | — |
| 1985 | 90° | 67° | 78° | — | — |
| 1984 | 84° | 66° | 75° | — | — |
| 1983 | 93° | 66° | 80° | — | — |
| 1982 | 98° | 64° | 81° | — | — |
| 1981 | 83° | 62° | 72° | — | — |
| 1980 | 79° | 63° | 71° | — | — |
| 1979 | 79° | 63° | 71° | — | — |
| 1978 | 82° | 64° | 73° | — | — |
| 1977 | 78° | 60° | 69° | — | — |
| 1976 | 81° | 65° | 73° | — | — |
| 1975 | 81° | 54° | 67° | — | — |
| 1974 | 85° | 57° | 71° | — | — |
| 1973coldest | 78° | 56° | 67° | — | — |
| 1972 | 79° | 63° | 71° | — | — |
| 1971 | 83° | 59° | 71° | — | — |
Mission Viejo, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Mission Viejo, CA Monthly Precipitation
Average rainfall per month, in inches.
Mission Viejo, 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 Mission Viejo, CA
Mission Viejo, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.