September weather in Jonesborough, TN
The average temperature in Jonesborough in September is 67.6°F (55.0°F–80.2°F). Average precipitation: 3.28 inches.
September is a fall month in Jonesborough, and is warmer than the annual average of 55.4°F. Daily temperatures swing about 25.2°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
80.2°F
Avg Low
55.0°F
Precipitation
3.28 in
Daylight
12h 13m
September records in Jonesborough
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1995) | 48.0°F (1999) | 1.48 in (1982) |
| September 2 | 91.9°F (1997) | 48.9°F (1999) | 0.87 in (2024) |
| September 3 | 93.0°F (2011) | 46.9°F (1987) | 0.97 in (1994) |
| September 4 | 91.9°F (1999) | 45.0°F (1995) | 1.21 in (1988) |
| September 5 | 91.0°F (1980) | 42.1°F (1997) | 2.40 in (2006) |
| September 6 | 91.9°F (1998) | 43.0°F (1984) | 2.15 in (2011) |
| September 7 | 93.9°F (1998) | 46.9°F (2017) | 0.83 in (2022) |
| September 8 | 91.9°F (1990) | 45.0°F (2017) | 1.74 in (1987) |
| September 9 | 91.9°F (1999) | 44.1°F (2017) | 0.51 in (2004) |
| September 10 | 91.0°F (2002) | 42.1°F (1998) | 1.20 in (1980) |
| September 11 | 98.1°F (2019) | 42.1°F (1998) | 1.57 in (1992) |
| September 12 | 98.1°F (2019) | 44.1°F (1993) | 1.00 in (2010) |
| September 13 | 91.9°F (2019) | 39.0°F (1985) | 0.70 in (2013) |
| September 14 | 97.0°F (1998) | 41.0°F (1985) | 1.14 in (1982) |
| September 15 | 96.1°F (1998) | 41.0°F (2015) | 1.68 in (2007) |
| September 16 | 91.0°F (1998) | 42.1°F (1984) | 1.91 in (1981) |
| September 17 | 91.0°F (2019) | 39.0°F (2000) | 2.40 in (2004) |
| September 18 | 90.0°F (1998) | 39.0°F (2000) | 1.29 in (2023) |
| September 19 | 90.0°F (1991) | 37.9°F (1984) | 2.18 in (1991) |
| September 20 | 91.0°F (2005) | 37.0°F (1981) | 0.22 in (2001) |
| September 21 | 90.0°F (1998) | 35.1°F (1983) | 1.68 in (1989) |
| September 22 | 91.0°F (2005) | 36.0°F (1983) | 2.27 in (1979) |
| September 23 | 90.0°F (2019) | 30.9°F (1983) | 1.38 in (2003) |
| September 24 | 91.0°F (2007) | 35.1°F (1981) | 0.85 in (2024) |
| September 25 | 91.0°F (2007) | 35.1°F (1981) | 1.27 in (2009) |
| September 26 | 90.0°F (2007) | 37.0°F (2001) | 2.86 in (2024) |
| September 27 | 91.0°F (1998) | 37.0°F (2001) | 1.06 in (2010) |
| September 28 | 90.0°F (1998) | 37.9°F (2001) | 1.51 in (1979) |
| September 29 | 89.1°F (1998) | 36.0°F (2022) | 1.29 in (1997) |
| September 30 | 91.0°F (2019) | 36.0°F (2022) | 1.43 in (2015) |