Weather on March 21
Santa Ana, CA
55 Years of Data
About This Date
March 21st in Santa Ana, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 51°F. Over 56 years of records, the warmest March 21st was in 2026 (73°F average), while the coldest was 1991 (51°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 23% of March 21st dates historically, with the wettest March 21st recording 3.05" 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 Santa Ana, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 85° | 62° | 73° | — | — |
| 2025 | 78° | 49° | 63° | — | — |
| 2024 | 74° | 57° | 65° | — | — |
| 2023 | 63° | 49° | 56° | 3.05" | — |
| 2022 | 74° | 52° | 63° | — | — |
| 2021 | 68° | 49° | 58° | — | — |
| 2020 | 70° | 52° | 61° | — | — |
| 2019 | 63° | 52° | 57° | 0.13" | — |
| 2018 | 74° | 56° | 65° | — | — |
| 2017 | 70° | 55° | 62° | 0.03" | — |
| 2016 | 73° | 57° | 65° | — | — |
| 2015 | 76° | 61° | 68° | — | — |
| 2014 | 70° | 56° | 63° | — | — |
| 2013 | 70° | 54° | 62° | — | — |
| 2012 | 80° | 47° | 63° | — | — |
| 2011 | 59° | 45° | 52° | 2.72" | — |
| 2010 | 81° | 53° | 67° | — | — |
| 2009 | 63° | 53° | 58° | — | — |
| 2008 | 83° | 42° | 62° | — | — |
| 2007 | 67° | 52° | 59° | 0.05" | — |
| 2006 | 59° | 50° | 55° | 0.05" | — |
| 2005 | 73° | 50° | 62° | — | — |
| 2004 | 74° | 56° | 65° | — | — |
| 2003 | 73° | 49° | 61° | — | — |
| 2002 | 80° | 46° | 63° | — | — |
| 2001 | 76° | 54° | 65° | — | — |
| 2000 | 73° | 53° | 63° | — | — |
| 1999 | 67° | 44° | 55° | — | — |
| 1998 | 70° | 55° | 62° | — | — |
| 1997 | 84° | 50° | 67° | — | — |
| 1996 | 66° | 57° | 62° | — | — |
| 1995 | 66° | 60° | 63° | 1.4" | — |
| 1994 | 71° | 52° | 61° | — | — |
| 1993 | 74° | 57° | 65° | — | — |
| 1992 | 65° | 54° | 59° | 1.68" | — |
| 1991coldest | 58° | 44° | 51° | 0.03" | — |
| 1990 | 87° | 52° | 69° | — | — |
| 1989 | 85° | 54° | 69° | — | — |
| 1988 | 81° | 51° | 66° | — | — |
| 1987 | 64° | 46° | 55° | 0.81" | — |
| 1986 | 89° | 52° | 70° | — | — |
| 1985 | 70° | 49° | 59° | — | — |
| 1984 | 78° | 52° | 65° | — | — |
| 1983 | 63° | 50° | 56° | 1.75" | — |
| 1982 | 71° | 44° | 58° | — | — |
| 1981 | 66° | 47° | 56° | — | — |
| 1980 | 68° | 52° | 60° | — | — |
| 1979 | 61° | 48° | 54° | 0.25" | — |
| 1978 | 70° | 59° | 64° | 0.05" | — |
| 1977 | 79° | 46° | 62° | — | — |
| 1976 | 82° | 47° | 64° | — | — |
| 1975 | 64° | 49° | 56° | — | — |
| 1974 | 69° | 50° | 60° | — | — |
| 1973 | 59° | 44° | 52° | — | — |
| 1972 | 74° | 54° | 64° | — | — |
| 1971 | 63° | 50° | 56° | — | — |
Santa Ana, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Santa Ana, CA Monthly Precipitation
Average rainfall per month, in inches.
Santa Ana, 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 Santa Ana, CA
Most pleasant months in Santa Ana, CA: June, July.