September weather in Keystone, WV
The average temperature in Keystone in September is 64.9°F (52.6°F–77.1°F). Average precipitation: inches.
September is a fall month in Keystone, and is warmer than the annual average of 52.8°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
77.1°F
Avg Low
52.6°F
Precipitation
in
Daylight
12h 14m
September records in Keystone
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1995) | 44.1°F (1892) | 1.34 in (2001) |
| September 2 | 89.1°F (1898) | 39.9°F (1909) | 0.70 in (1905) |
| September 3 | 89.1°F (1899) | 44.1°F (1908) | 2.17 in (1898) |
| September 4 | 91.0°F (2007) | 43.0°F (1997) | 0.75 in (2006) |
| September 5 | 93.0°F (1899) | 39.0°F (1997) | 1.40 in (2003) |
| September 6 | 95.0°F (2007) | 39.9°F (1997) | 1.30 in (1999) |
| September 7 | 93.0°F (2007) | 45.0°F (1892) | 1.26 in (1996) |
| September 8 | 91.9°F (2007) | 45.0°F (2005) | 1.35 in (1910) |
| September 9 | 91.0°F (1990) | 45.0°F (2005) | 1.65 in (2004) |
| September 10 | 93.0°F (2002) | 37.9°F (1998) | 0.71 in (1990) |
| September 11 | 91.0°F (2002) | 39.9°F (1998) | 1.75 in (1911) |
| September 12 | 90.0°F (1900) | 42.1°F (1993) | 0.55 in (1902) |
| September 13 | 87.1°F (1897) | 42.1°F (1993) | 0.87 in (1996) |
| September 14 | 91.0°F (1998) | 35.1°F (1902) | 0.97 in (2007) |
| September 15 | 93.9°F (1998) | 37.0°F (2007) | 2.80 in (1900) |
| September 16 | 91.0°F (1897) | 37.9°F (2007) | 0.81 in (1897) |
| September 17 | 86.0°F (1991) | 34.0°F (2000) | 1.47 in (1995) |
| September 18 | 89.1°F (1896) | 35.1°F (2000) | 1.25 in (1912) |
| September 19 | 87.1°F (1991) | 36.0°F (1903) | 1.71 in (1991) |
| September 20 | 88.0°F (1895) | 37.9°F (1903) | 0.44 in (1990) |
| September 21 | 87.1°F (2005) | 36.0°F (1897) | 1.21 in (1907) |
| September 22 | 87.1°F (1895) | 36.0°F (1897) | 0.88 in (1990) |
| September 23 | 88.0°F (2007) | 32.0°F (1913) | 1.35 in (1912) |
| September 24 | 89.1°F (2007) | 35.1°F (1999) | 0.60 in (1893) |
| September 25 | 90.0°F (2007) | 36.0°F (1990) | 1.03 in (1893) |
| September 26 | 88.0°F (2007) | 33.1°F (2003) | 0.75 in (1993) |
| September 27 | 84.0°F (1900) | 33.1°F (1909) | 1.17 in (2002) |
| September 28 | 84.9°F (1904) | 35.1°F (1909) | 0.80 in (2004) |
| September 29 | 87.1°F (1904) | 36.0°F (1908) | 1.68 in (1916) |
| September 30 | 82.0°F (2002) | 33.1°F (1899) | 1.71 in (1999) |