September weather in South Boston, VA
The average temperature in South Boston in September is 70.8°F (59.0°F–82.6°F). Average precipitation: 4.69 inches.
September is a fall month in South Boston, and is warmer than the annual average of 58.5°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
82.6°F
Avg Low
59.0°F
Precipitation
4.69 in
Daylight
12h 13m
September records in South Boston
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1991) | 48.9°F (2025) | 2.10 in (1978) |
| September 2 | 100.0°F (1980) | 46.9°F (1983) | 2.31 in (1974) |
| September 3 | 100.0°F (1980) | 46.9°F (1988) | 2.16 in (2012) |
| September 4 | 96.1°F (1980) | 48.9°F (1982) | 1.68 in (2003) |
| September 5 | 95.0°F (2019) | 44.1°F (1997) | 3.13 in (1996) |
| September 6 | 97.0°F (1983) | 41.0°F (1982) | 5.70 in (1996) |
| September 7 | 98.1°F (1983) | 37.9°F (1982) | 4.28 in (1974) |
| September 8 | 100.0°F (1990) | 41.0°F (1988) | 2.37 in (1987) |
| September 9 | 97.0°F (2016) | 39.9°F (1982) | 1.22 in (1977) |
| September 10 | 98.1°F (2016) | 46.0°F (1986) | 1.64 in (1988) |
| September 11 | 98.1°F (1983) | 46.0°F (1998) | 1.29 in (1971) |
| September 12 | 100.0°F (1983) | 46.9°F (1993) | 3.76 in (1971) |
| September 13 | 98.1°F (1983) | 46.0°F (1993) | 1.10 in (1987) |
| September 14 | 93.9°F (1998) | 39.0°F (1985) | 1.61 in (2006) |
| September 15 | 98.1°F (1991) | 39.9°F (1985) | 1.20 in (2002) |
| September 16 | 95.0°F (1991) | 39.9°F (1985) | 3.50 in (1999) |
| September 17 | 96.1°F (1991) | 41.0°F (1983) | 1.85 in (2018) |
| September 18 | 102.9°F (1991) | 42.1°F (1984) | 2.93 in (2020) |
| September 19 | 93.0°F (1978) | 39.9°F (1984) | 2.55 in (2003) |
| September 20 | 93.0°F (1978) | 39.9°F (1984) | 1.86 in (2016) |
| September 21 | 91.0°F (2017) | 42.1°F (1981) | 1.36 in (1989) |
| September 22 | 93.9°F (1980) | 39.0°F (2020) | 4.17 in (1979) |
| September 23 | 97.0°F (1980) | 30.0°F (1983) | 1.86 in (2003) |
| September 24 | 95.0°F (2019) | 30.9°F (1983) | 2.00 in (2023) |
| September 25 | 91.9°F (2010) | 30.9°F (1983) | 3.58 in (2024) |
| September 26 | 93.0°F (1986) | 28.9°F (1983) | 2.14 in (1989) |
| September 27 | 95.0°F (2019) | 30.9°F (1983) | 1.70 in (2015) |
| September 28 | 93.9°F (1998) | 35.1°F (1982) | 1.40 in (2010) |
| September 29 | 97.0°F (2019) | 34.0°F (1981) | 1.13 in (1972) |
| September 30 | 99.0°F (2019) | 34.0°F (1981) | 2.64 in (2010) |