Weather on October 21
Mission Viejo, CA
55 Years of Data
Avg High
78°F
Avg Low
58°F
Warmest
2003
88°F avg
Coldest
2004
59°F avg
About This Date
October 21st in Mission Viejo, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 58°F. Over 55 years of records, the warmest October 21st was in 2003 (88°F average), while the coldest was 2004 (59°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 5% of October 21st dates historically. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Mission Viejo, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 59° | 73° | — | — |
| 2024 | 86° | 62° | 74° | — | — |
| 2023 | 86° | 59° | 73° | — | — |
| 2022 | 78° | 57° | 68° | — | — |
| 2021 | 81° | 54° | 67° | — | — |
| 2020 | 77° | 59° | 68° | — | — |
| 2019 | 91° | 71° | 81° | — | — |
| 2018 | 81° | 59° | 70° | — | — |
| 2017 | 78° | 54° | 66° | — | — |
| 2016 | 92° | 68° | 80° | — | — |
| 2015 | 78° | 59° | 69° | — | — |
| 2014 | 82° | 59° | 71° | — | — |
| 2013 | 76° | 47° | 61° | — | — |
| 2012 | 71° | 60° | 66° | — | — |
| 2011 | 76° | 55° | 65° | — | — |
| 2010 | 64° | 56° | 60° | — | — |
| 2009 | 85° | 56° | 70° | — | — |
| 2008 | 87° | 56° | 71° | — | — |
| 2007 | 82° | 55° | 69° | — | — |
| 2006 | 87° | 58° | 72° | — | — |
| 2005 | 68° | 57° | 63° | — | — |
| 2004coldest | 65° | 53° | 59° | — | — |
| 2003warmest | 100° | 75° | 88° | — | — |
| 2002 | 73° | 52° | 62° | — | — |
| 2001 | 74° | 55° | 64° | — | — |
| 2000 | 73° | 59° | 66° | — | — |
| 1999 | 96° | 67° | 81° | — | — |
| 1998 | 75° | 55° | 65° | — | — |
| 1997 | 72° | 57° | 64° | — | — |
| 1996 | 73° | 53° | 63° | — | — |
| 1995 | 68° | 58° | 63° | — | — |
| 1994 | 79° | 51° | 65° | — | — |
| 1993 | 84° | 60° | 72° | — | — |
| 1992 | 71° | 63° | 67° | 0.05" | — |
| 1991 | 76° | 65° | 70° | — | — |
| 1990 | 86° | 61° | 73° | — | — |
| 1989 | 70° | 59° | 64° | 0.13" | — |
| 1988 | 73° | 60° | 67° | — | — |
| 1987 | 75° | 55° | 65° | — | — |
| 1986 | 81° | 55° | 68° | — | — |
| 1985 | 70° | 59° | 64° | 0.23" | — |
| 1984 | 71° | 54° | 62° | — | — |
| 1983 | 82° | 62° | 72° | — | — |
| 1982 | 81° | 55° | 68° | — | — |
| 1981 | 77° | 57° | 67° | — | — |
| 1980 | 84° | 60° | 72° | — | — |
| 1979 | 70° | 54° | 62° | — | — |
| 1978 | 74° | 61° | 67° | — | — |
| 1977 | 72° | 56° | 64° | — | — |
| 1976 | 76° | 64° | 70° | — | — |
| 1975 | 70° | 54° | 62° | — | — |
| 1974 | 66° | 54° | 60° | — | — |
| 1973 | 69° | 53° | 61° | — | — |
| 1972 | 76° | 52° | 64° | — | — |
| 1971 | 81° | 51° | 66° | — | — |
55 years of data from EL TORO MCAS