September weather in Petersburg, TX
The average temperature in Petersburg in September is 70.7°F (57.8°F–83.6°F). Average precipitation: 2.51 inches.
September is a fall month in Petersburg, and is warmer than the annual average of 59.3°F. Daily temperatures swing about 25.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
83.6°F
Avg Low
57.8°F
Precipitation
2.51 in
Daylight
12h 12m
September records in Petersburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (2011) | 55.9°F (2017) | 1.07 in (1972) |
| September 2 | 99.0°F (2014) | 54.0°F (2003) | 1.29 in (2006) |
| September 3 | 100.0°F (2023) | 53.1°F (2003) | 0.47 in (1979) |
| September 4 | 100.9°F (2023) | 52.0°F (2008) | 1.37 in (1950) |
| September 5 | 100.9°F (2023) | 48.9°F (2011) | 2.78 in (1986) |
| September 6 | 99.0°F (2012) | 48.9°F (2011) | 0.77 in (1987) |
| September 7 | 95.0°F (2023) | 52.0°F (2017) | 1.37 in (2007) |
| September 8 | 102.9°F (2023) | 46.9°F (2004) | 1.12 in (2018) |
| September 9 | 102.0°F (2023) | 39.9°F (2020) | 2.09 in (1951) |
| September 10 | 93.9°F (2021) | 39.9°F (2020) | 0.84 in (1969) |
| September 11 | 99.0°F (2021) | 42.1°F (2020) | 4.48 in (2006) |
| September 12 | 96.1°F (2021) | 53.1°F (2004) | 3.58 in (2008) |
| September 13 | 97.0°F (2011) | 46.0°F (2014) | 2.19 in (1989) |
| September 14 | 100.9°F (2024) | 46.0°F (2014) | 1.02 in (2025) |
| September 15 | 99.0°F (2024) | 46.9°F (1979) | 2.63 in (1982) |
| September 16 | 93.9°F (2024) | 48.9°F (1979) | 3.97 in (1995) |
| September 17 | 96.1°F (1980) | 48.9°F (1980) | 1.02 in (2001) |
| September 18 | 93.9°F (2015) | 48.9°F (1980) | 1.61 in (1950) |
| September 19 | 99.0°F (2015) | 46.0°F (2020) | 1.71 in (1974) |
| September 20 | 96.1°F (2024) | 46.0°F (2003) | 1.25 in (1978) |
| September 21 | 97.0°F (2021) | 46.0°F (2020) | 2.34 in (2019) |
| September 22 | 97.0°F (1980) | 45.0°F (2021) | 0.89 in (2004) |
| September 23 | 98.1°F (2025) | 39.9°F (2009) | 1.15 in (1997) |
| September 24 | 96.1°F (2023) | 41.0°F (2009) | 2.94 in (1986) |
| September 25 | 95.0°F (2003) | 43.0°F (2006) | 2.61 in (1958) |
| September 26 | 96.1°F (2005) | 43.0°F (2006) | 1.36 in (2004) |
| September 27 | 100.0°F (2020) | 46.9°F (2010) | 1.54 in (1980) |
| September 28 | 96.1°F (2009) | 46.9°F (2010) | 1.43 in (2004) |
| September 29 | 93.9°F (1979) | 39.9°F (2020) | 0.86 in (1985) |
| September 30 | 95.0°F (1979) | 42.1°F (2020) | 0.35 in (1959) |