September weather in Sour Lake, TX
The average temperature in Sour Lake in September is 79.0°F (69.4°F–88.5°F). Average precipitation: 6.55 inches.
September is a fall month in Sour Lake, and is warmer than the annual average of 68.9°F. Daily temperatures swing about 19.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 10m. For travel, September is a wet month.
Avg High
88.5°F
Avg Low
69.4°F
Precipitation
6.55 in
Daylight
12h 10m
September records in Sour Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 105.1°F (2000) | 64.0°F (1987) | 2.78 in (2003) |
| September 2 | 105.1°F (2000) | 64.0°F (1987) | 3.98 in (1979) |
| September 3 | 105.1°F (2000) | 55.9°F (1987) | 3.35 in (1950) |
| September 4 | 105.1°F (2000) | 61.0°F (1987) | 8.89 in (1950) |
| September 5 | 107.1°F (2000) | 57.9°F (1984) | 1.77 in (1956) |
| September 6 | 105.1°F (2000) | 55.9°F (2011) | 10.28 in (1980) |
| September 7 | 100.0°F (2023) | 55.0°F (2011) | 3.08 in (1986) |
| September 8 | 102.0°F (2023) | 55.9°F (2011) | 1.22 in (2014) |
| September 9 | 102.9°F (2023) | 59.0°F (2011) | 0.83 in (1952) |
| September 10 | 96.1°F (1959) | 59.0°F (2012) | 1.87 in (1978) |
| September 11 | 97.0°F (1954) | 61.0°F (2012) | 3.55 in (1998) |
| September 12 | 95.0°F (1963) | 57.0°F (1954) | 5.91 in (1998) |
| September 13 | 97.0°F (2010) | 57.0°F (1954) | 4.92 in (2008) |
| September 14 | 98.1°F (1953) | 57.0°F (2015) | 3.12 in (2021) |
| September 15 | 100.0°F (1962) | 57.0°F (1989) | 1.29 in (1998) |
| September 16 | 96.1°F (1980) | 55.0°F (1979) | 1.18 in (1998) |
| September 17 | 98.1°F (2004) | 54.0°F (1961) | 2.22 in (1963) |
| September 18 | 99.0°F (2004) | 51.1°F (1981) | 11.55 in (1963) |
| September 19 | 98.1°F (2004) | 48.0°F (1981) | 19.43 in (2019) |
| September 20 | 97.0°F (2016) | 52.0°F (1981) | 4.43 in (1951) |
| September 21 | 98.1°F (1953) | 54.0°F (1991) | 10.23 in (1958) |
| September 22 | 100.0°F (2005) | 48.0°F (1983) | 1.83 in (1958) |
| September 23 | 99.0°F (2005) | 48.9°F (1982) | 3.99 in (2020) |
| September 24 | 95.0°F (1993) | 51.1°F (1990) | 6.24 in (2005) |
| September 25 | 95.0°F (1993) | 48.9°F (1994) | 1.48 in (1959) |
| September 26 | 95.0°F (2022) | 48.9°F (1982) | 3.35 in (1957) |
| September 27 | 93.9°F (1954) | 51.1°F (1991) | 3.77 in (1996) |
| September 28 | 95.0°F (1956) | 48.9°F (1993) | 3.88 in (2015) |
| September 29 | 98.1°F (1956) | 51.1°F (1948) | 3.37 in (2015) |
| September 30 | 95.0°F (1953) | 48.9°F (2000) | 4.81 in (2015) |