Weather on October 21
San Antonio, TX
55 Years of Data
Avg High
81°F
Avg Low
58°F
Warmest
1979
84°F avg
Coldest
1976
50°F avg
About This Date
October 21st in San Antonio, TX typically brings warm fall weather, with average highs around 81°F and lows near 58°F. Over 55 years of records, the warmest October 21st was in 1979 (84°F average), while the coldest was 1976 (50°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 25% of October 21st dates historically, with the wettest October 21st recording 2.54" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in San Antonio, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 72° | 81° | — | — |
| 2024 | 85° | 59° | 72° | — | — |
| 2023 | 94° | 49° | 71° | — | — |
| 2022 | 81° | 45° | 63° | — | — |
| 2021 | 83° | 62° | 72° | — | — |
| 2020 | 91° | 73° | 82° | — | — |
| 2019 | 90° | 67° | 78° | 0.43" | — |
| 2018 | 72° | 60° | 66° | — | — |
| 2017 | 79° | 67° | 73° | — | — |
| 2016 | 77° | 52° | 64° | — | — |
| 2015 | 90° | 71° | 80° | 0.03" | — |
| 2014 | 84° | 62° | 73° | — | — |
| 2013 | 74° | 45° | 59° | — | — |
| 2012 | 86° | 64° | 75° | — | — |
| 2011 | 80° | 46° | 63° | — | — |
| 2010 | 85° | 62° | 73° | — | — |
| 2009 | 83° | 58° | 70° | — | — |
| 2008 | 82° | 54° | 68° | — | — |
| 2007 | 87° | 56° | 71° | — | — |
| 2006 | 74° | 47° | 60° | — | — |
| 2005 | 88° | 65° | 76° | — | — |
| 2004 | 88° | 76° | 82° | — | — |
| 2003 | 82° | 54° | 68° | — | — |
| 2002 | 76° | 62° | 69° | 0.23" | — |
| 2001 | 79° | 57° | 68° | — | — |
| 2000 | 79° | 66° | 72° | 0.08" | — |
| 1999 | 72° | 40° | 56° | — | — |
| 1998 | 69° | 60° | 65° | 0.08" | — |
| 1997 | 82° | 54° | 68° | — | — |
| 1996 | 87° | 55° | 71° | — | — |
| 1995 | 83° | 41° | 62° | — | — |
| 1994 | 90° | 75° | 82° | — | — |
| 1993 | 73° | 51° | 62° | — | — |
| 1992 | 87° | 67° | 77° | — | — |
| 1991 | 84° | 53° | 69° | — | — |
| 1990 | 75° | 47° | 61° | 2.13" | — |
| 1989 | 80° | 50° | 65° | — | — |
| 1988 | 90° | 68° | 79° | — | — |
| 1987 | 75° | 53° | 64° | — | — |
| 1986 | 69° | 62° | 66° | 1.7" | — |
| 1985 | 70° | 66° | 68° | 1.42" | — |
| 1984 | 72° | 59° | 65° | 0.03" | — |
| 1983 | 80° | 56° | 68° | — | — |
| 1982 | 67° | 58° | 62° | — | — |
| 1981 | 77° | 62° | 70° | 0.15" | — |
| 1980 | 80° | 59° | 70° | 0.1" | — |
| 1979warmest | 92° | 76° | 84° | — | — |
| 1978 | 83° | 48° | 65° | — | — |
| 1977 | 85° | 62° | 73° | 2.54" | — |
| 1976coldest | 65° | 36° | 50° | — | — |
| 1975 | 86° | 66° | 76° | — | — |
| 1974 | 78° | 63° | 70° | 0.79" | — |
| 1973 | 82° | 51° | 67° | — | — |
| 1972 | 89° | 65° | 77° | 0.28" | — |
| 1971 | 81° | 54° | 67° | — | — |
55 years of data from SAN ANTONIO INCARNATE WORD