Weather on September 18
Austin, TX
55 Years of Data
Avg High
91°F
Avg Low
70°F
Warmest
1977
87°F avg
Coldest
1981
66°F avg
About This Date
September 18th in Austin, TX typically brings hot fall weather, with average highs around 91°F and lows near 70°F. Over 55 years of records, the warmest September 18th was in 1977 (87°F average), while the coldest was 1981 (66°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 18th dates historically, with the wettest September 18th recording 9.3" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Austin, 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 | 97° | 71° | 84° | — | — |
| 2024 | 99° | 76° | 87° | — | — |
| 2023 | 96° | 67° | 81° | — | — |
| 2022 | 97° | 75° | 86° | — | — |
| 2021 | 99° | 72° | 85° | — | — |
| 2020 | 89° | 71° | 80° | — | — |
| 2019 | 101° | 74° | 87° | — | — |
| 2018 | 91° | 64° | 78° | — | — |
| 2017 | 91° | 68° | 80° | — | — |
| 2016 | 93° | 70° | 81° | — | — |
| 2015 | 96° | 75° | 86° | — | — |
| 2014 | 90° | 72° | 81° | 9.3" | — |
| 2013 | 90° | 72° | 81° | — | — |
| 2012 | 83° | 64° | 73° | — | — |
| 2011 | 93° | 68° | 81° | 0.05" | — |
| 2010 | 92° | 70° | 81° | 0.41" | — |
| 2009 | 82° | 70° | 76° | — | — |
| 2008 | 82° | 55° | 69° | — | — |
| 2007 | 89° | 64° | 77° | — | — |
| 2006 | 89° | 69° | 79° | 3.56" | — |
| 2005 | 99° | 73° | 86° | — | — |
| 2004 | 99° | 67° | 83° | — | — |
| 2003 | 84° | 70° | 77° | — | — |
| 2002 | 91° | 76° | 83° | — | — |
| 2001 | 91° | 71° | 81° | — | — |
| 2000 | 93° | 56° | 74° | — | — |
| 1999 | 94° | 68° | 81° | — | — |
| 1998 | 91° | 75° | 83° | — | — |
| 1997 | 95° | 74° | 84° | — | — |
| 1996 | 90° | 70° | 80° | 1.88" | — |
| 1995 | 93° | 71° | 82° | — | — |
| 1994 | 89° | 64° | 77° | — | — |
| 1993 | 94° | 68° | 81° | — | — |
| 1992 | 94° | 74° | 84° | — | — |
| 1991 | 92° | 65° | 78° | — | — |
| 1990 | 93° | 75° | 84° | — | — |
| 1989 | 93° | 60° | 77° | — | — |
| 1988 | 93° | 78° | 86° | — | — |
| 1987 | 86° | 70° | 78° | 2.34" | — |
| 1986 | 93° | 75° | 84° | — | — |
| 1985 | 92° | 73° | 82° | — | — |
| 1984 | 89° | 66° | 78° | — | — |
| 1983 | 85° | 70° | 77° | 2.82" | — |
| 1982 | 98° | 74° | 86° | — | — |
| 1981coldest | 77° | 55° | 66° | — | — |
| 1980 | 95° | 72° | 83° | — | — |
| 1979 | 77° | 69° | 73° | 1.96" | — |
| 1978 | 91° | 75° | 83° | — | — |
| 1977warmest | 96° | 77° | 87° | — | — |
| 1976 | 90° | 70° | 80° | — | — |
| 1975 | 95° | 73° | 84° | — | — |
| 1974 | 87° | 72° | 79° | — | — |
| 1973 | 85° | 63° | 74° | — | — |
| 1972 | 95° | 75° | 85° | — | — |
| 1971 | 82° | 62° | 72° | — | — |
55 years of data from AUSTIN 6S