September weather in Dallas, TX
The average temperature in Dallas in September is 80.1°F (70.1°F–90.0°F). Average precipitation: 3.10 inches.
September is a fall month in Dallas, and is warmer than the annual average of 68°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
90.0°F
Avg Low
70.1°F
Precipitation
3.10 in
Daylight
12h 11m
September records in Dallas
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (2000) | 60.1°F (1944) | 1.58 in (2020) |
| September 2 | 109.0°F (1939) | 63.0°F (1955) | 2.16 in (1984) |
| September 3 | 109.0°F (2000) | 59.0°F (1952) | 1.88 in (1992) |
| September 4 | 109.9°F (2000) | 55.0°F (1974) | 2.03 in (1981) |
| September 5 | 102.9°F (1963) | 53.1°F (1974) | 1.63 in (1973) |
| September 6 | 105.1°F (2012) | 53.1°F (1974) | 1.07 in (1942) |
| September 7 | 108.0°F (2023) | 55.9°F (1974) | 2.77 in (2018) |
| September 8 | 109.0°F (2023) | 55.9°F (1950) | 5.25 in (2010) |
| September 9 | 102.0°F (1954) | 55.0°F (1944) | 2.84 in (2020) |
| September 10 | 100.0°F (1980) | 55.9°F (1941) | 4.68 in (2007) |
| September 11 | 100.9°F (2000) | 54.0°F (1948) | 2.01 in (2003) |
| September 12 | 102.9°F (2011) | 48.9°F (1940) | 4.19 in (1961) |
| September 13 | 107.1°F (2011) | 54.0°F (1940) | 1.97 in (2009) |
| September 14 | 102.0°F (1953) | 50.0°F (1945) | 1.11 in (1993) |
| September 15 | 100.9°F (1980) | 50.0°F (1945) | 1.01 in (2005) |
| September 16 | 102.0°F (1980) | 53.1°F (1979) | 1.71 in (1970) |
| September 17 | 100.9°F (1997) | 51.1°F (1951) | 2.00 in (2006) |
| September 18 | 100.0°F (1980) | 48.0°F (1981) | 2.19 in (1976) |
| September 19 | 100.9°F (1956) | 50.0°F (1981) | 2.53 in (1958) |
| September 20 | 102.0°F (1953) | 50.0°F (1971) | 2.17 in (1964) |
| September 21 | 100.9°F (1944) | 43.0°F (1983) | 4.32 in (1965) |
| September 22 | 100.9°F (1980) | 45.0°F (1983) | 2.64 in (2018) |
| September 23 | 100.0°F (2005) | 46.9°F (1975) | 1.95 in (1970) |
| September 24 | 100.0°F (2023) | 51.1°F (1975) | 1.00 in (1941) |
| September 25 | 102.0°F (2005) | 48.0°F (1975) | 2.68 in (2010) |
| September 26 | 102.0°F (1977) | 44.1°F (1942) | 3.32 in (1973) |
| September 27 | 104.0°F (1977) | 36.0°F (1942) | 1.04 in (1964) |
| September 28 | 105.1°F (1953) | 46.0°F (1942) | 1.96 in (1959) |
| September 29 | 100.0°F (1953) | 46.0°F (1974) | 3.39 in (1980) |
| September 30 | 100.0°F (1977) | 43.0°F (1942) | 1.18 in (1943) |