September weather in Fairfax, SC
The average temperature in Fairfax in September is 73.9°F (63.0°F–84.9°F). Average precipitation: 4.24 inches.
September is a fall month in Fairfax, and is warmer than the annual average of 63.3°F. Daily temperatures swing about 21.9°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
84.9°F
Avg Low
63.0°F
Precipitation
4.24 in
Daylight
12h 12m
September records in Fairfax
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1998) | 53.1°F (1999) | 2.00 in (1997) |
| September 2 | 95.0°F (1994) | 52.0°F (1999) | 1.12 in (2003) |
| September 3 | 95.0°F (1989) | 55.9°F (1999) | 0.70 in (1993) |
| September 4 | 96.1°F (1990) | 55.9°F (1995) | 3.25 in (1998) |
| September 5 | 95.0°F (1983) | 48.9°F (1997) | 1.80 in (1988) |
| September 6 | 100.9°F (1999) | 48.0°F (1997) | 1.21 in (1986) |
| September 7 | 99.0°F (1999) | 50.0°F (1997) | 3.10 in (2004) |
| September 8 | 100.0°F (1990) | 55.0°F (2011) | 1.10 in (2004) |
| September 9 | 98.1°F (1990) | 54.0°F (2011) | 2.57 in (1988) |
| September 10 | 98.1°F (1996) | 48.9°F (1998) | 0.80 in (1993) |
| September 11 | 97.0°F (1990) | 48.9°F (1998) | 0.95 in (1997) |
| September 12 | 98.1°F (1983) | 54.0°F (1998) | 1.60 in (2008) |
| September 13 | 95.0°F (1983) | 54.0°F (1993) | 0.98 in (2014) |
| September 14 | 95.0°F (1991) | 45.0°F (1985) | 1.60 in (2006) |
| September 15 | 97.0°F (1984) | 50.0°F (1996) | 1.88 in (1989) |
| September 16 | 97.0°F (1991) | 53.1°F (1985) | 0.67 in (1999) |
| September 17 | 99.0°F (2005) | 54.0°F (1999) | 0.75 in (1981) |
| September 18 | 98.1°F (2005) | 55.0°F (1984) | 1.51 in (1988) |
| September 19 | 95.0°F (2005) | 48.0°F (1981) | 0.86 in (2014) |
| September 20 | 96.1°F (2005) | 46.0°F (1984) | 0.75 in (2006) |
| September 21 | 97.0°F (2010) | 48.0°F (1984) | 2.51 in (1989) |
| September 22 | 97.0°F (1990) | 52.0°F (1983) | 4.35 in (1989) |
| September 23 | 93.9°F (1990) | 41.0°F (1999) | 1.73 in (2011) |
| September 24 | 91.9°F (1986) | 41.0°F (1999) | 0.58 in (1994) |
| September 25 | 93.9°F (1986) | 42.1°F (1990) | 1.15 in (1995) |
| September 26 | 95.0°F (1986) | 48.0°F (1990) | 1.74 in (1997) |
| September 27 | 97.0°F (1986) | 50.0°F (1983) | 2.80 in (2010) |
| September 28 | 95.0°F (1986) | 45.0°F (1985) | 1.70 in (2005) |
| September 29 | 97.0°F (1986) | 46.0°F (1993) | 1.13 in (2005) |
| September 30 | 91.0°F (2005) | 44.1°F (2003) | 0.35 in (1999) |