Weather on April 21
Antioch, CA
55 Years of Data
Avg High
74°F
Avg Low
49°F
Warmest
2002
85°F avg
Coldest
1971
50°F avg
About This Date
April 21st in Antioch, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 49°F — a 25°F daily swing. Over 54 years of records, the warmest April 21st was in 2002 (85°F average), while the coldest was 1971 (50°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 4% of April 21st dates historically, with the wettest April 21st recording 0.64" of rain. The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Antioch, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 59° | 68° | — | — |
| 2024 | 78° | 57° | 68° | — | — |
| 2023 | 75° | 55° | 65° | — | — |
| 2022 | 58° | 45° | 51° | — | — |
| 2021 | 72° | 51° | 61° | — | — |
| 2020 | 76° | 48° | 62° | — | — |
| 2019 | 77° | 50° | 64° | — | — |
| 2018 | 74° | 54° | 64° | — | — |
| 2017 | 79° | 54° | 66° | — | — |
| 2016 | 75° | 55° | 65° | — | — |
| 2015 | 89° | 50° | 70° | — | — |
| 2014 | 76° | 54° | 65° | — | — |
| 2013 | 86° | 52° | 69° | — | — |
| 2012 | 87° | 59° | 73° | — | — |
| 2011 | 87° | 49° | 68° | — | — |
| 2010 | 66° | 45° | 55° | — | — |
| 2009 | 94° | 55° | 74° | — | — |
| 2008 | 64° | 40° | 52° | — | — |
| 2007 | 64° | 49° | 56° | 0.64" | — |
| 2006 | 66° | 43° | 54° | — | — |
| 2005 | 74° | 49° | 61° | — | — |
| 2004 | 57° | 44° | 51° | — | — |
| 2003 | 58° | 43° | 50° | — | — |
| 2002warmest | 103° | 67° | 85° | — | — |
| 2001 | 62° | 37° | 50° | — | — |
| 2000 | 76° | 55° | 65° | — | — |
| 1999 | 71° | 51° | 61° | — | — |
| 1998 | 77° | 46° | 62° | — | — |
| 1997 | 76° | 60° | 68° | — | — |
| 1996 | 62° | 42° | 52° | — | — |
| 1995 | 65° | 47° | 56° | — | — |
| 1994 | 79° | 56° | 67° | — | — |
| 1993 | 78° | 51° | 65° | — | — |
| 1992 | 83° | 53° | 68° | — | — |
| 1991 | 65° | 50° | 57° | 0.05" | — |
| 1990 | 73° | 47° | 60° | — | — |
| 1988 | 63° | 47° | 55° | — | — |
| 1987 | 79° | 51° | 65° | — | — |
| 1986 | 85° | 45° | 65° | — | — |
| 1985 | 61° | 48° | 54° | — | — |
| 1984 | 71° | 48° | 60° | — | — |
| 1983 | 68° | 45° | 56° | — | — |
| 1982 | 80° | 51° | 66° | — | — |
| 1981 | 67° | 45° | 56° | — | — |
| 1980 | 71° | 41° | 56° | — | — |
| 1979 | 72° | 40° | 56° | — | — |
| 1978 | 65° | 41° | 53° | — | — |
| 1977 | 82° | 41° | 62° | — | — |
| 1976 | 82° | 45° | 63° | — | — |
| 1975 | 75° | 46° | 61° | — | — |
| 1974 | 72° | 49° | 60° | — | — |
| 1973 | 73° | 54° | 63° | — | — |
| 1972 | 74° | 44° | 59° | — | — |
| 1971coldest | 60° | 40° | 50° | — | — |
54 years of data from ANTIOCH FIBREBRD MILLS