September weather in South Mountain, TX
The average temperature in South Mountain in September is 77.4°F (65.2°F–89.6°F). Average precipitation: 2.94 inches.
September is a fall month in South Mountain, and is warmer than the annual average of 66.5°F. Daily temperatures swing about 24.4°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
89.6°F
Avg Low
65.2°F
Precipitation
2.94 in
Daylight
12h 11m
September records in South Mountain
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (1939) | 55.0°F (1915) | 4.20 in (1970) |
| September 2 | 109.0°F (1939) | 57.0°F (1915) | 3.95 in (1981) |
| September 3 | 109.9°F (2000) | 54.0°F (1915) | 1.40 in (2020) |
| September 4 | 111.0°F (2000) | 53.1°F (1974) | 3.75 in (1906) |
| September 5 | 111.9°F (2000) | 50.0°F (1974) | 3.60 in (2018) |
| September 6 | 105.1°F (1963) | 48.9°F (1974) | 1.47 in (2004) |
| September 7 | 105.1°F (1963) | 48.9°F (1974) | 4.75 in (1920) |
| September 8 | 102.0°F (1951) | 48.9°F (2017) | 8.67 in (2010) |
| September 9 | 102.0°F (1940) | 52.0°F (1956) | 6.50 in (1966) |
| September 10 | 102.9°F (1963) | 55.0°F (1968) | 1.00 in (1921) |
| September 11 | 102.9°F (1963) | 48.0°F (1907) | 2.78 in (1955) |
| September 12 | 104.0°F (2011) | 48.0°F (1968) | 3.28 in (1961) |
| September 13 | 105.1°F (2011) | 48.9°F (1940) | 2.96 in (1924) |
| September 14 | 102.0°F (1965) | 53.1°F (1945) | 1.25 in (1993) |
| September 15 | 102.0°F (1965) | 50.0°F (1993) | 2.00 in (1915) |
| September 16 | 100.9°F (1960) | 48.0°F (1993) | 2.42 in (1923) |
| September 17 | 100.0°F (1927) | 44.1°F (1903) | 2.71 in (1974) |
| September 18 | 105.1°F (1956) | 42.1°F (1903) | 1.27 in (1988) |
| September 19 | 100.9°F (1960) | 42.1°F (1981) | 2.10 in (1918) |
| September 20 | 102.9°F (1953) | 43.0°F (1971) | 4.00 in (2013) |
| September 21 | 102.0°F (1937) | 44.1°F (1971) | 1.40 in (1919) |
| September 22 | 100.9°F (1944) | 39.0°F (1983) | 5.50 in (1919) |
| September 23 | 99.0°F (1939) | 39.0°F (1994) | 2.76 in (1955) |
| September 24 | 102.0°F (2005) | 44.1°F (1947) | 4.04 in (1964) |
| September 25 | 106.0°F (2011) | 42.1°F (1989) | 3.67 in (1935) |
| September 26 | 105.1°F (2005) | 42.1°F (2000) | 1.71 in (1936) |
| September 27 | 109.9°F (1953) | 36.0°F (1942) | 4.77 in (1936) |
| September 28 | 105.1°F (1953) | 42.1°F (1942) | 1.46 in (1959) |
| September 29 | 100.9°F (1938) | 39.0°F (1908) | 1.33 in (1945) |
| September 30 | 99.0°F (1938) | 39.0°F (1999) | 4.97 in (1988) |