Weather on March 21
Vista, CA
55 Years of Data
Avg High
67°F
Avg Low
50°F
Warmest
2026
69°F avg
Coldest
1973
49°F avg
About This Date
March 21st in Vista, CA typically brings mild spring weather, with average highs around 67°F and lows near 50°F. Over 56 years of records, the warmest March 21st was in 2026 (69°F average), while the coldest was 1973 (49°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 25% of March 21st dates historically, with the wettest March 21st recording 3.1" of rain. 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 March 21st in Vista, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 77° | 60° | 69° | — | — |
| 2025 | 65° | 48° | 56° | — | — |
| 2024 | 65° | 55° | 60° | — | — |
| 2023 | 62° | 52° | 57° | 3.1" | — |
| 2022 | 64° | 50° | 57° | — | — |
| 2021 | 61° | 48° | 54° | — | — |
| 2020 | 63° | 52° | 57° | — | — |
| 2019 | 62° | 52° | 57° | 0.23" | — |
| 2018 | 72° | 53° | 62° | — | — |
| 2017 | 69° | 53° | 61° | 0.03" | — |
| 2016 | 66° | 56° | 61° | — | — |
| 2015 | 68° | 58° | 63° | — | — |
| 2014 | 64° | 57° | 61° | — | — |
| 2013 | 67° | 54° | 60° | — | — |
| 2012 | 66° | 47° | 56° | — | — |
| 2011 | 60° | 49° | 54° | 1.24" | — |
| 2010 | 70° | 49° | 59° | — | — |
| 2009 | 61° | 54° | 57° | — | — |
| 2008 | 67° | 48° | 57° | 0.03" | — |
| 2007 | 59° | 51° | 55° | 0.05" | — |
| 2006 | 56° | 48° | 52° | 0.48" | — |
| 2005 | 64° | 53° | 59° | — | — |
| 2004 | 63° | 54° | 58° | — | — |
| 2003 | 63° | 48° | 55° | — | — |
| 2002 | 69° | 48° | 59° | — | — |
| 2001 | 73° | 51° | 62° | — | — |
| 2000 | 67° | 50° | 58° | — | — |
| 1999 | 61° | 44° | 52° | — | — |
| 1998 | 64° | 51° | 58° | — | — |
| 1997 | 85° | 48° | 66° | — | — |
| 1996 | 71° | 54° | 62° | — | — |
| 1995 | 63° | 51° | 57° | 1.37" | — |
| 1994 | 69° | 50° | 60° | — | — |
| 1993 | 69° | 57° | 63° | — | — |
| 1992 | 66° | 54° | 60° | 1.78" | — |
| 1991 | 57° | 43° | 50° | 1.68" | — |
| 1990 | 82° | 53° | 68° | — | — |
| 1989 | 83° | 49° | 66° | — | — |
| 1988 | 76° | 50° | 63° | — | — |
| 1987 | 61° | 45° | 53° | 0.58" | — |
| 1986 | 87° | 48° | 68° | — | — |
| 1985 | 65° | 47° | 56° | — | — |
| 1984 | 78° | 48° | 63° | — | — |
| 1983 | 64° | 47° | 55° | 1.75" | — |
| 1982 | 71° | 43° | 57° | — | — |
| 1981 | 65° | 42° | 53° | — | — |
| 1980 | 65° | 50° | 57° | — | — |
| 1979 | 59° | 46° | 53° | 1.32" | — |
| 1978 | 67° | 51° | 59° | — | — |
| 1977 | 79° | 43° | 61° | — | — |
| 1976 | 79° | 52° | 65° | — | — |
| 1975 | 60° | 48° | 54° | — | — |
| 1974 | 65° | 48° | 56° | — | — |
| 1973coldest | 58° | 40° | 49° | 0.1" | — |
| 1972 | 70° | 51° | 60° | — | — |
| 1971 | 64° | 45° | 54° | — | — |
56 years of data from CARLSBAD MCCLELLAN PALOMAR AP