Weather on May 21
Santa Ana, CA
55 Years of Data
Avg High
75°F
Avg Low
58°F
Warmest
1994
75°F avg
Coldest
1991
58°F avg
About This Date
May 21st in Santa Ana, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 58°F. Over 55 years of records, the warmest May 21st was in 1994 (75°F average), while the coldest was 1991 (58°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 21st dates historically. 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 May 21st in Santa Ana, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 62° | 75° | — | — |
| 2024 | 73° | 56° | 64° | — | — |
| 2023 | 75° | 60° | 68° | — | — |
| 2022 | 69° | 61° | 65° | — | — |
| 2021 | 73° | 56° | 64° | — | — |
| 2020 | 83° | 58° | 70° | — | — |
| 2019 | 67° | 56° | 61° | — | — |
| 2018 | 65° | 58° | 61° | 0.05" | — |
| 2017 | 86° | 63° | 74° | — | — |
| 2016 | 70° | 57° | 63° | — | — |
| 2015 | 72° | 60° | 66° | — | — |
| 2014 | 74° | 58° | 66° | — | — |
| 2013 | 78° | 62° | 70° | — | — |
| 2012 | 81° | 61° | 71° | — | — |
| 2011 | 76° | 56° | 66° | — | — |
| 2010 | 76° | 56° | 66° | — | — |
| 2009 | 80° | 59° | 70° | — | — |
| 2008 | 76° | 61° | 68° | — | — |
| 2007 | 67° | 57° | 62° | — | — |
| 2006 | 75° | 60° | 68° | — | — |
| 2005 | 88° | 59° | 73° | — | — |
| 2004 | 72° | 58° | 65° | — | — |
| 2003 | 85° | 55° | 70° | — | — |
| 2002 | 68° | 50° | 59° | — | — |
| 2001 | 75° | 60° | 68° | — | — |
| 2000 | 80° | 57° | 69° | — | — |
| 1999 | 68° | 56° | 62° | — | — |
| 1998 | 72° | 56° | 64° | — | — |
| 1997 | 78° | 65° | 71° | — | — |
| 1996 | 77° | 59° | 68° | — | — |
| 1995 | 69° | 56° | 62° | — | — |
| 1994warmest | 78° | 72° | 75° | — | — |
| 1993 | 76° | 60° | 68° | — | — |
| 1992 | 74° | 60° | 67° | — | — |
| 1991coldest | 67° | 49° | 58° | — | — |
| 1990 | 75° | 57° | 66° | — | — |
| 1989 | 79° | 54° | 66° | — | — |
| 1988 | 84° | 62° | 73° | — | — |
| 1987 | 71° | 55° | 63° | — | — |
| 1986 | 73° | 60° | 67° | — | — |
| 1985 | 74° | 58° | 66° | — | — |
| 1984 | 74° | 58° | 66° | — | — |
| 1983 | 82° | 59° | 71° | — | — |
| 1982 | 68° | 61° | 64° | — | — |
| 1981 | 72° | 53° | 62° | — | — |
| 1980 | 72° | 55° | 63° | 0.13" | — |
| 1979 | 73° | 61° | 67° | — | — |
| 1978 | 75° | 59° | 67° | — | — |
| 1977 | 75° | 56° | 65° | — | — |
| 1976 | 72° | 59° | 65° | — | — |
| 1975 | 68° | 51° | 60° | — | — |
| 1974 | 81° | 52° | 66° | — | — |
| 1973 | 71° | 58° | 64° | — | — |
| 1972 | 70° | 49° | 59° | — | — |
| 1971 | 69° | 53° | 61° | — | — |
55 years of data from SANTA ANA FIRE STN