Weather on April 21
San Antonio, TX
55 Years of Data
Avg High
81°F
Avg Low
59°F
Warmest
1996
81°F avg
Coldest
2013
57°F avg
About This Date
April 21st in San Antonio, TX typically brings warm spring weather, with average highs around 81°F and lows near 59°F. Over 55 years of records, the warmest April 21st was in 1996 (81°F average), while the coldest was 2013 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 24% of April 21st dates historically, with the wettest April 21st recording 2.9" of rain. The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in San Antonio, TX? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 59° | 73° | — | — |
| 2024 | 77° | 53° | 65° | 1.91" | — |
| 2023 | 82° | 62° | 72° | 1.22" | — |
| 2022 | 82° | 62° | 72° | — | — |
| 2021 | 84° | 44° | 64° | — | — |
| 2020 | 92° | 46° | 69° | — | — |
| 2019 | 81° | 44° | 62° | — | — |
| 2018 | 64° | 58° | 61° | — | — |
| 2017 | 86° | 71° | 79° | — | — |
| 2016 | 84° | 61° | 72° | 1.27" | — |
| 2015 | 79° | 53° | 66° | — | — |
| 2014 | 83° | 68° | 75° | — | — |
| 2013coldest | 74° | 41° | 57° | — | — |
| 2012 | 77° | 52° | 64° | 0.08" | — |
| 2011 | 87° | 74° | 80° | — | — |
| 2010 | 76° | 55° | 65° | — | — |
| 2009 | 91° | 49° | 70° | — | — |
| 2008 | 82° | 61° | 71° | — | — |
| 2007 | 79° | 64° | 71° | — | — |
| 2006 | 83° | 63° | 73° | 2.9" | — |
| 2005 | 82° | 67° | 74° | — | — |
| 2004 | 80° | 66° | 73° | — | — |
| 2003 | 72° | 62° | 67° | 0.08" | — |
| 2002 | 86° | 70° | 78° | — | — |
| 2001 | 83° | 69° | 76° | — | — |
| 2000 | 86° | 53° | 70° | — | — |
| 1999 | 86° | 64° | 75° | — | — |
| 1998 | 78° | 53° | 66° | — | — |
| 1997 | 90° | 67° | 78° | — | — |
| 1996warmest | 91° | 71° | 81° | — | — |
| 1995 | 94° | 50° | 72° | — | — |
| 1994 | 85° | 56° | 70° | — | — |
| 1993 | 77° | 50° | 64° | — | — |
| 1992 | 81° | 49° | 65° | — | — |
| 1991 | 79° | 57° | 68° | — | — |
| 1990 | 84° | 68° | 76° | — | — |
| 1989 | 87° | 64° | 76° | — | — |
| 1988 | 86° | 63° | 74° | — | — |
| 1987 | 72° | 56° | 64° | — | — |
| 1986 | 85° | 53° | 69° | — | — |
| 1985 | 77° | 65° | 71° | — | — |
| 1984 | 90° | 66° | 78° | — | — |
| 1983 | 81° | 65° | 73° | 0.23" | — |
| 1982 | 64° | 53° | 59° | — | — |
| 1981 | 83° | 69° | 76° | 0.1" | — |
| 1980 | 81° | 50° | 65° | — | — |
| 1979 | 75° | 64° | 70° | 1.83" | — |
| 1978 | 79° | 43° | 61° | — | — |
| 1977 | 75° | 57° | 66° | 0.1" | — |
| 1976 | 82° | 54° | 68° | — | — |
| 1975 | 70° | 58° | 64° | — | — |
| 1974 | 84° | 72° | 78° | 0.03" | — |
| 1973 | 79° | 73° | 76° | 0.08" | — |
| 1972 | 82° | 65° | 73° | 1.37" | — |
| 1971 | 85° | 47° | 66° | — | — |
55 years of data from SAN ANTONIO INCARNATE WORD