Weather on September 21
Dallas, TX
55 Years of Data
Avg High
88°F
Avg Low
68°F
Warmest
1980
88°F avg
Coldest
1983
56°F avg
About This Date
September 21st in Dallas, TX typically brings warm fall weather, with average highs around 88°F and lows near 68°F. Over 55 years of records, the warmest September 21st was in 1980 (88°F average), while the coldest was 1983 (56°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 21st dates historically, with the wettest September 21st recording 8.94" of rain. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Dallas, TX? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 76° | 85° | 0.03" | — |
| 2024 | 96° | 79° | 87° | — | — |
| 2023 | 93° | 76° | 84° | — | — |
| 2022 | 96° | 76° | 86° | — | — |
| 2021 | 89° | 70° | 79° | — | — |
| 2020 | 75° | 66° | 71° | 0.79" | — |
| 2019 | 95° | 77° | 86° | — | — |
| 2018 | 88° | 75° | 81° | 8.94" | — |
| 2017 | 97° | 79° | 88° | — | — |
| 2016 | 94° | 77° | 85° | — | — |
| 2015 | 94° | 70° | 82° | — | — |
| 2014 | 95° | 70° | 82° | — | — |
| 2013 | 86° | 61° | 73° | — | — |
| 2012 | 95° | 70° | 82° | — | — |
| 2011 | 93° | 67° | 80° | — | — |
| 2010 | 88° | 72° | 80° | 0.05" | — |
| 2009 | 92° | 71° | 81° | 1.47" | — |
| 2008 | 87° | 67° | 77° | — | — |
| 2007 | 91° | 69° | 80° | — | — |
| 2006 | 91° | 66° | 79° | — | — |
| 2005 | 99° | 73° | 86° | — | — |
| 2004 | 90° | 69° | 79° | — | — |
| 2003 | 81° | 70° | 75° | — | — |
| 2002 | 87° | 59° | 73° | — | — |
| 2001 | 84° | 71° | 78° | 0.58" | — |
| 2000 | 91° | 69° | 80° | — | — |
| 1999 | 76° | 61° | 68° | — | — |
| 1998 | 96° | 78° | 87° | — | — |
| 1997 | 94° | 67° | 80° | — | — |
| 1996 | 86° | 60° | 73° | — | — |
| 1995 | 71° | 50° | 61° | 0.08" | — |
| 1994 | 88° | 67° | 77° | — | — |
| 1993 | 94° | 74° | 84° | — | — |
| 1992 | 96° | 71° | 84° | 2.39" | — |
| 1991 | 77° | 56° | 66° | — | — |
| 1990 | 87° | 75° | 81° | — | — |
| 1989 | 86° | 66° | 76° | — | — |
| 1988 | 94° | 73° | 83° | — | — |
| 1987 | 86° | 64° | 75° | — | — |
| 1986 | 91° | 74° | 82° | — | — |
| 1985 | 90° | 68° | 79° | — | — |
| 1984 | 82° | 68° | 75° | 0.03" | — |
| 1983coldest | 70° | 43° | 56° | — | — |
| 1982 | 74° | 52° | 63° | — | — |
| 1981 | 90° | 63° | 76° | — | — |
| 1980warmest | 99° | 77° | 88° | — | — |
| 1979 | 87° | 60° | 74° | — | — |
| 1978 | 80° | 63° | 71° | 1.7" | — |
| 1977 | 92° | 70° | 81° | — | — |
| 1976 | 83° | 60° | 71° | — | — |
| 1975 | 71° | 56° | 63° | 0.1" | — |
| 1974 | 73° | 62° | 68° | 0.15" | — |
| 1973 | 91° | 73° | 82° | — | — |
| 1972 | 85° | 67° | 76° | 0.76" | — |
| 1971 | 77° | 59° | 68° | — | — |
55 years of data from DALLAS FAA AP