Weather on August 20
San Antonio, TX
55 Years of Data
Avg High
95°F
Avg Low
75°F
Warmest
2023
92°F avg
Coldest
1992
77°F avg
About This Date
August 20th in San Antonio, TX typically brings hot summer weather, with average highs around 95°F and lows near 75°F. Over 55 years of records, the warmest August 20th was in 2023 (92°F average), while the coldest was 1992 (77°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 9% of August 20th dates historically, with the wettest August 20th recording 3.91" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in San Antonio, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 99° | 73° | 86° | — | — |
| 2024 | 101° | 78° | 89° | — | — |
| 2023warmest | 104° | 80° | 92° | — | — |
| 2022 | 99° | 79° | 89° | — | — |
| 2021 | 94° | 79° | 86° | — | — |
| 2020 | 101° | 68° | 84° | — | — |
| 2019 | 99° | 79° | 89° | — | — |
| 2018 | 99° | 75° | 87° | — | — |
| 2017 | 96° | 78° | 87° | — | — |
| 2016 | 84° | 74° | 79° | 2.26" | — |
| 2015 | 89° | 73° | 81° | 0.08" | — |
| 2014 | 101° | 79° | 90° | — | — |
| 2013 | 94° | 70° | 82° | — | — |
| 2012 | 89° | 71° | 80° | — | — |
| 2011 | 102° | 77° | 90° | — | — |
| 2010 | 98° | 78° | 88° | — | — |
| 2009 | 97° | 77° | 87° | — | — |
| 2008 | 87° | 69° | 78° | 3.91" | — |
| 2007 | 90° | 76° | 83° | — | — |
| 2006 | 97° | 74° | 85° | — | — |
| 2005 | 97° | 77° | 87° | — | — |
| 2004 | 95° | 76° | 85° | — | — |
| 2003 | 94° | 75° | 84° | — | — |
| 2002 | 94° | 76° | 85° | — | — |
| 2001 | 89° | 75° | 82° | 0.28" | — |
| 2000 | 95° | 73° | 84° | — | — |
| 1999 | 100° | 68° | 84° | — | — |
| 1998 | 92° | 74° | 83° | — | — |
| 1997 | 100° | 76° | 88° | — | — |
| 1996 | 97° | 73° | 85° | — | — |
| 1995 | 100° | 73° | 87° | — | — |
| 1994 | 101° | 78° | 89° | — | — |
| 1993 | 98° | 73° | 86° | — | — |
| 1992coldest | 86° | 68° | 77° | — | — |
| 1991 | 98° | 71° | 85° | — | — |
| 1990 | 97° | 76° | 86° | — | — |
| 1989 | 99° | 77° | 88° | — | — |
| 1988 | 97° | 78° | 87° | — | — |
| 1987 | 97° | 74° | 85° | — | — |
| 1986 | 100° | 78° | 89° | 0.05" | — |
| 1985 | 97° | 76° | 86° | — | — |
| 1984 | 100° | 76° | 88° | — | — |
| 1983 | 97° | 78° | 87° | — | — |
| 1982 | 97° | 72° | 84° | — | — |
| 1981 | 91° | 73° | 82° | — | — |
| 1980 | 92° | 75° | 83° | — | — |
| 1979 | 92° | 77° | 84° | — | — |
| 1978 | 94° | 74° | 84° | — | — |
| 1977 | 94° | 76° | 85° | — | — |
| 1976 | 89° | 70° | 79° | — | — |
| 1975 | 94° | 75° | 84° | — | — |
| 1974 | 92° | 76° | 84° | — | — |
| 1973 | 93° | 73° | 83° | — | — |
| 1972 | 91° | 71° | 81° | — | — |
| 1971 | 92° | 74° | 83° | — | — |
55 years of data from SAN ANTONIO INCARNATE WORD