Weather on October 21
Antioch, CA
55 Years of Data
Avg High
75°F
Avg Low
52°F
Warmest
1991
77°F avg
Coldest
2012
54°F avg
About This Date
October 21st in Antioch, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 52°F. Over 55 years of records, the warmest October 21st was in 1991 (77°F average), while the coldest was 2012 (54°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 4% of October 21st dates historically, with the wettest October 21st recording 0.91" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Antioch, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 52° | 63° | — | — |
| 2024 | 70° | 59° | 64° | — | — |
| 2023 | 61° | 53° | 57° | — | — |
| 2022 | 78° | 53° | 66° | — | — |
| 2021 | 66° | 57° | 62° | — | — |
| 2020 | 89° | 62° | 76° | — | — |
| 2019 | 86° | 57° | 72° | — | — |
| 2018 | 72° | 62° | 67° | — | — |
| 2017 | 63° | 45° | 54° | — | — |
| 2016 | 81° | 54° | 67° | — | — |
| 2015 | 82° | 56° | 69° | — | — |
| 2014 | 72° | 53° | 62° | — | — |
| 2013 | 77° | 50° | 64° | — | — |
| 2012coldest | 59° | 48° | 54° | — | — |
| 2011 | 85° | 54° | 69° | — | — |
| 2010 | 69° | 52° | 60° | — | — |
| 2009 | 68° | 53° | 61° | — | — |
| 2008 | 80° | 49° | 64° | — | — |
| 2007 | 74° | 49° | 61° | — | — |
| 2006 | 78° | 58° | 68° | — | — |
| 2005 | 72° | 52° | 62° | — | — |
| 2004 | 66° | 48° | 57° | — | — |
| 2003 | 87° | 55° | 71° | — | — |
| 2002 | 78° | 53° | 66° | — | — |
| 2001 | 80° | 47° | 63° | — | — |
| 2000 | 71° | 55° | 63° | — | — |
| 1999 | 81° | 55° | 68° | — | — |
| 1998 | 83° | 51° | 67° | — | — |
| 1997 | 74° | 50° | 62° | — | — |
| 1996 | 66° | 49° | 57° | — | — |
| 1995 | 79° | 53° | 66° | — | — |
| 1994 | 73° | 46° | 60° | — | — |
| 1993 | 78° | 53° | 66° | — | — |
| 1992 | 78° | 56° | 67° | 0.2" | — |
| 1991warmest | 91° | 62° | 77° | — | — |
| 1990 | 75° | 48° | 62° | — | — |
| 1989 | 72° | 59° | 65° | — | — |
| 1988 | 87° | 54° | 70° | — | — |
| 1987 | 74° | 56° | 65° | — | — |
| 1986 | 71° | 47° | 59° | — | — |
| 1985 | 68° | 48° | 58° | 0.91" | — |
| 1984 | 74° | 47° | 60° | — | — |
| 1983 | 84° | 48° | 66° | — | — |
| 1982 | 75° | 55° | 65° | — | — |
| 1981 | 81° | 45° | 63° | — | — |
| 1980 | 80° | 45° | 62° | — | — |
| 1979 | 68° | 42° | 55° | — | — |
| 1978 | 73° | 50° | 62° | — | — |
| 1977 | 72° | 47° | 59° | — | — |
| 1976 | 84° | 48° | 66° | — | — |
| 1975 | 85° | 49° | 67° | — | — |
| 1974 | 76° | 56° | 66° | — | — |
| 1973 | 72° | 56° | 64° | — | — |
| 1972 | 70° | 48° | 59° | — | — |
| 1971 | 66° | 44° | 55° | — | — |
55 years of data from ANTIOCH FIBREBRD MILLS