September weather in Summit, SC
The average temperature in Summit in September is 74.3°F (64.6°F–83.9°F). Average precipitation: 4.05 inches.
September is a fall month in Summit, and is warmer than the annual average of 63°F. Daily temperatures swing about 19.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
83.9°F
Avg Low
64.6°F
Precipitation
4.05 in
Daylight
12h 12m
September records in Summit
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1907) | 59.0°F (1908) | 1.20 in (1901) |
| September 2 | 98.1°F (1921) | 55.9°F (1915) | 1.78 in (2016) |
| September 3 | 99.0°F (1921) | 55.9°F (1909) | 5.75 in (1998) |
| September 4 | 98.1°F (1921) | 59.0°F (2021) | 1.90 in (1953) |
| September 5 | 97.0°F (1921) | 59.0°F (1914) | 3.72 in (1979) |
| September 6 | 99.0°F (1921) | 55.0°F (2025) | 1.50 in (2000) |
| September 7 | 93.9°F (1921) | 57.0°F (2011) | 1.60 in (1950) |
| September 8 | 95.0°F (1899) | 55.9°F (2017) | 3.50 in (1987) |
| September 9 | 95.0°F (1911) | 52.0°F (2025) | 2.80 in (1988) |
| September 10 | 99.0°F (1901) | 50.0°F (1918) | 1.95 in (1990) |
| September 11 | 96.1°F (1900) | 50.0°F (2025) | 1.32 in (1996) |
| September 12 | 95.0°F (1915) | 46.0°F (1917) | 2.70 in (1983) |
| September 13 | 97.0°F (1896) | 46.9°F (1917) | 3.55 in (1964) |
| September 14 | 98.1°F (1900) | 52.0°F (1902) | 2.40 in (2006) |
| September 15 | 95.0°F (1896) | 50.0°F (1902) | 3.02 in (1976) |
| September 16 | 99.0°F (1915) | 48.9°F (1902) | 2.40 in (2018) |
| September 17 | 96.1°F (1915) | 48.9°F (1908) | 2.50 in (2020) |
| September 18 | 96.1°F (1896) | 50.0°F (1903) | 2.38 in (1906) |
| September 19 | 96.1°F (1896) | 48.0°F (1903) | 2.98 in (2002) |
| September 20 | 99.0°F (1896) | 46.9°F (1903) | 2.10 in (1913) |
| September 21 | 98.1°F (1905) | 44.1°F (1916) | 1.36 in (1973) |
| September 22 | 95.0°F (1905) | 43.0°F (1913) | 2.17 in (1989) |
| September 23 | 93.0°F (1905) | 46.0°F (1903) | 3.00 in (1897) |
| September 24 | 93.9°F (1900) | 44.1°F (1896) | 2.15 in (1912) |
| September 25 | 91.0°F (1905) | 46.9°F (1913) | 3.45 in (1997) |
| September 26 | 93.0°F (1905) | 50.0°F (1909) | 2.80 in (1956) |
| September 27 | 93.9°F (2019) | 45.0°F (1899) | 4.50 in (1953) |
| September 28 | 95.0°F (1904) | 44.1°F (1909) | 2.15 in (2004) |
| September 29 | 99.0°F (1904) | 46.0°F (1903) | 2.91 in (1963) |
| September 30 | 93.0°F (1904) | 45.0°F (1903) | 5.00 in (1959) |