Weather on August 31
San Antonio, TX
55 Years of Data
Avg High
94°F
Avg Low
73°F
Warmest
1989
89°F avg
Coldest
2001
74°F avg
About This Date
August 31st in San Antonio, TX typically brings hot summer weather, with average highs around 94°F and lows near 73°F. Over 55 years of records, the warmest August 31st was in 1989 (89°F average), while the coldest was 2001 (74°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 18% of August 31st dates historically, with the wettest August 31st recording 10.72" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in San Antonio, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 72° | 84° | 7.9" | — |
| 2024 | 92° | 74° | 83° | — | — |
| 2023 | 99° | 69° | 84° | — | — |
| 2022 | 93° | 76° | 84° | — | — |
| 2021 | 92° | 72° | 82° | — | — |
| 2020 | 100° | 78° | 89° | — | — |
| 2019 | 98° | 76° | 87° | — | — |
| 2018 | 98° | 75° | 87° | — | — |
| 2017 | 90° | 61° | 75° | — | — |
| 2016 | 93° | 74° | 83° | — | — |
| 2015 | 96° | 75° | 86° | — | — |
| 2014 | 98° | 78° | 88° | — | — |
| 2013 | 100° | 74° | 87° | — | — |
| 2012 | 100° | 79° | 89° | — | — |
| 2011 | 102° | 74° | 88° | — | — |
| 2010 | 97° | 78° | 87° | — | — |
| 2009 | 96° | 72° | 84° | — | — |
| 2008 | 91° | 71° | 81° | — | — |
| 2007 | 86° | 71° | 79° | — | — |
| 2006 | 94° | 69° | 81° | — | — |
| 2005 | 95° | 71° | 83° | — | — |
| 2004 | 95° | 70° | 82° | — | — |
| 2003 | 96° | 76° | 86° | 0.1" | — |
| 2002 | 91° | 69° | 80° | — | — |
| 2001coldest | 76° | 72° | 74° | 10.72" | — |
| 2000 | 99° | 75° | 87° | — | — |
| 1999 | 97° | 72° | 84° | — | — |
| 1998 | 93° | 71° | 82° | — | — |
| 1997 | 97° | 75° | 86° | — | — |
| 1996 | 86° | 71° | 79° | 2.34" | — |
| 1995 | 90° | 72° | 81° | — | — |
| 1994 | 90° | 75° | 82° | 1.3" | — |
| 1993 | 97° | 77° | 87° | — | — |
| 1992 | 96° | 77° | 87° | — | — |
| 1991 | 90° | 73° | 81° | 2.67" | — |
| 1990 | 100° | 76° | 88° | — | — |
| 1989warmest | 99° | 79° | 89° | — | — |
| 1988 | 94° | 72° | 83° | — | — |
| 1987 | 91° | 71° | 81° | 0.28" | — |
| 1986 | 96° | 74° | 85° | 3.4" | — |
| 1985 | 97° | 72° | 84° | — | — |
| 1984 | 93° | 74° | 83° | 0.13" | — |
| 1983 | 101° | 74° | 87° | — | — |
| 1982 | 97° | 76° | 86° | — | — |
| 1981 | 94° | 74° | 84° | — | — |
| 1980 | 94° | 77° | 85° | — | — |
| 1979 | 93° | 75° | 84° | — | — |
| 1978 | 88° | 72° | 80° | 1.73" | — |
| 1977 | 92° | 73° | 82° | — | — |
| 1976 | 90° | 70° | 80° | — | — |
| 1975 | 89° | 71° | 80° | — | — |
| 1974 | 88° | 74° | 81° | — | — |
| 1973 | 90° | 76° | 83° | — | — |
| 1972 | 92° | 69° | 80° | — | — |
| 1971 | 91° | 73° | 82° | — | — |
55 years of data from SAN ANTONIO INCARNATE WORD