Weather on March 21
Mission Viejo, CA
55 Years of Data
Avg High
70°F
Avg Low
50°F
Warmest
2026
74°F avg
Coldest
2006
46°F avg
About This Date
March 21st in Mission Viejo, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 50°F. Over 56 years of records, the warmest March 21st was in 2026 (74°F average), while the coldest was 2006 (46°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 11% of March 21st dates historically, with the wettest March 21st recording 2.13" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Mission Viejo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 84° | 64° | 74° | — | — |
| 2025 | 75° | 51° | 63° | — | — |
| 2024 | 72° | 51° | 61° | — | — |
| 2023 | 58° | 47° | 52° | — | — |
| 2022 | 71° | 48° | 60° | — | — |
| 2021 | 64° | 45° | 54° | — | — |
| 2020 | 64° | 49° | 56° | — | — |
| 2019 | 62° | 47° | 54° | — | — |
| 2018 | 77° | 54° | 65° | — | — |
| 2017 | 67° | 50° | 58° | — | — |
| 2016 | 70° | 50° | 60° | — | — |
| 2015 | 74° | 49° | 61° | — | — |
| 2014 | 67° | 51° | 59° | — | — |
| 2013 | 70° | 49° | 59° | — | — |
| 2012 | 75° | 50° | 63° | — | — |
| 2011 | 56° | 44° | 50° | — | — |
| 2010 | 80° | 54° | 67° | — | — |
| 2009 | 63° | 48° | 55° | — | — |
| 2008 | 82° | 48° | 65° | — | — |
| 2007 | 59° | 46° | 53° | — | — |
| 2006coldest | 52° | 41° | 46° | — | — |
| 2005 | 74° | 48° | 61° | — | — |
| 2004 | 76° | 52° | 64° | — | — |
| 2003 | 71° | 47° | 59° | — | — |
| 2002 | 85° | 52° | 68° | — | — |
| 2001 | 70° | 50° | 60° | — | — |
| 2000 | 72° | 49° | 60° | — | — |
| 1999 | 66° | 43° | 54° | — | — |
| 1998 | 70° | 52° | 61° | — | — |
| 1997 | 75° | 50° | 63° | — | — |
| 1996 | 67° | 55° | 61° | — | — |
| 1995 | 61° | 49° | 55° | 2.13" | — |
| 1994 | 71° | 50° | 61° | — | — |
| 1993 | 73° | 58° | 65° | — | — |
| 1992 | 64° | 53° | 59° | 0.58" | — |
| 1991 | 61° | 47° | 54° | — | — |
| 1990 | 85° | 54° | 69° | — | — |
| 1989 | 82° | 55° | 69° | — | — |
| 1988 | 78° | 51° | 65° | — | — |
| 1987 | 58° | 48° | 53° | 0.76" | — |
| 1986 | 84° | 57° | 71° | — | — |
| 1985 | 66° | 49° | 57° | — | — |
| 1984 | 74° | 52° | 63° | — | — |
| 1983 | 61° | 51° | 56° | 0.91" | — |
| 1982 | 69° | 44° | 57° | — | — |
| 1981 | 65° | 47° | 56° | — | — |
| 1980 | 62° | 49° | 55° | — | — |
| 1979 | 57° | 47° | 52° | 0.71" | — |
| 1978 | 66° | 58° | 62° | — | — |
| 1977 | 78° | 42° | 60° | — | — |
| 1976 | 82° | 55° | 69° | — | — |
| 1975 | 62° | 49° | 55° | — | — |
| 1974 | 64° | 44° | 54° | — | — |
| 1973 | 59° | 42° | 51° | 0.86" | — |
| 1972 | 73° | 50° | 62° | — | — |
| 1971 | 69° | 48° | 59° | — | — |
56 years of data from EL TORO MCAS