Weather on October 21
Santa Ana, CA
55 Years of Data
Avg High
79°F
Avg Low
58°F
Warmest
2003
78°F avg
Coldest
2004
60°F avg
About This Date
October 21st in Santa Ana, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 58°F. Over 55 years of records, the warmest October 21st was in 2003 (78°F average), while the coldest was 2004 (60°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 5% of October 21st dates historically, with the wettest October 21st recording 0.76" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Santa Ana, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 58° | 71° | — | — |
| 2024 | 88° | 56° | 72° | — | — |
| 2023 | 85° | 64° | 74° | — | — |
| 2022 | 82° | 64° | 73° | — | — |
| 2021 | 79° | 52° | 65° | — | — |
| 2020 | 79° | 66° | 72° | — | — |
| 2019 | 93° | 59° | 76° | — | — |
| 2018 | 82° | 61° | 71° | — | — |
| 2017 | 81° | 58° | 69° | — | — |
| 2016 | 92° | 62° | 77° | — | — |
| 2015 | 82° | 63° | 72° | — | — |
| 2014 | 82° | 62° | 72° | — | — |
| 2013 | 76° | 57° | 66° | — | — |
| 2012 | 74° | 63° | 68° | — | — |
| 2011 | 76° | 61° | 68° | — | — |
| 2010 | 69° | 60° | 65° | 0.76" | — |
| 2009 | 86° | 54° | 70° | — | — |
| 2008 | 86° | 54° | 70° | — | — |
| 2007 | 83° | 50° | 66° | — | — |
| 2006 | 85° | 54° | 69° | — | — |
| 2005 | 65° | 62° | 63° | — | — |
| 2004coldest | 69° | 51° | 60° | — | — |
| 2003warmest | 96° | 61° | 78° | — | — |
| 2002 | 71° | 58° | 64° | — | — |
| 2001 | 74° | 59° | 66° | — | — |
| 2000 | 76° | 60° | 68° | — | — |
| 1999 | 97° | 57° | 77° | — | — |
| 1998 | 76° | 57° | 66° | — | — |
| 1997 | 75° | 59° | 67° | — | — |
| 1996 | 75° | 54° | 64° | — | — |
| 1995 | 73° | 60° | 67° | — | — |
| 1994 | 81° | 52° | 66° | — | — |
| 1993 | 83° | 56° | 69° | — | — |
| 1992 | 71° | 65° | 68° | 0.2" | — |
| 1991 | 77° | 64° | 71° | — | — |
| 1990 | 90° | 65° | 77° | — | — |
| 1989 | 73° | 59° | 66° | 0.15" | — |
| 1988 | 76° | 63° | 69° | — | — |
| 1987 | 79° | 56° | 67° | — | — |
| 1986 | 83° | 52° | 67° | — | — |
| 1985 | 71° | 60° | 66° | — | — |
| 1984 | 78° | 51° | 65° | — | — |
| 1983 | 84° | 60° | 72° | — | — |
| 1982 | 82° | 52° | 67° | — | — |
| 1981 | 77° | 60° | 69° | — | — |
| 1980 | 87° | 50° | 69° | — | — |
| 1979 | 72° | 52° | 62° | — | — |
| 1978 | 82° | 62° | 72° | — | — |
| 1977 | 74° | 56° | 65° | — | — |
| 1976 | 75° | 65° | 70° | — | — |
| 1975 | 74° | 57° | 65° | — | — |
| 1974 | 77° | 58° | 67° | — | — |
| 1973 | 72° | 60° | 66° | — | — |
| 1972 | 73° | 51° | 62° | — | — |
| 1971 | 81° | 50° | 65° | — | — |
55 years of data from SANTA ANA FIRE STN