September weather in Signal Mountain, TN
The average temperature in Signal Mountain in September is 69.5°F (61.3°F–77.6°F). Average precipitation: 4.92 inches.
September is a fall month in Signal Mountain, and is warmer than the annual average of 57.4°F. Daily temperatures swing about 16.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
77.6°F
Avg Low
61.3°F
Precipitation
4.92 in
Daylight
12h 12m
September records in Signal Mountain
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (1998) | 61.0°F (1999) | 1.17 in (2021) |
| September 2 | 90.0°F (2010) | 55.9°F (2017) | 1.81 in (2001) |
| September 3 | 93.0°F (2011) | 55.9°F (2017) | 1.00 in (2025) |
| September 4 | 91.0°F (2011) | 51.1°F (1997) | 2.75 in (2003) |
| September 5 | 88.0°F (2007) | 52.0°F (1997) | 2.10 in (2011) |
| September 6 | 91.9°F (2007) | 55.0°F (1997) | 6.66 in (2011) |
| September 7 | 89.1°F (2002) | 53.1°F (2017) | 0.84 in (2011) |
| September 8 | 91.0°F (2016) | 53.1°F (2024) | 1.37 in (2004) |
| September 9 | 91.0°F (2016) | 53.1°F (1998) | 1.30 in (1999) |
| September 10 | 91.0°F (2002) | 52.0°F (1998) | 1.44 in (1997) |
| September 11 | 91.9°F (2002) | 54.0°F (2012) | 0.82 in (2018) |
| September 12 | 91.9°F (2002) | 55.9°F (1998) | 0.68 in (2022) |
| September 13 | 87.1°F (2016) | 48.9°F (2015) | 0.93 in (2020) |
| September 14 | 87.1°F (2016) | 50.0°F (2015) | 0.66 in (2007) |
| September 15 | 87.1°F (2016) | 52.0°F (1996) | 0.80 in (2007) |
| September 16 | 90.0°F (2016) | 48.9°F (2011) | 0.50 in (2002) |
| September 17 | 88.0°F (2016) | 48.9°F (2000) | 8.40 in (2004) |
| September 18 | 84.9°F (2010) | 51.1°F (2011) | 3.90 in (2012) |
| September 19 | 86.0°F (2010) | 50.0°F (2012) | 1.98 in (2021) |
| September 20 | 90.0°F (2010) | 50.0°F (2006) | 2.45 in (2021) |
| September 21 | 89.1°F (2010) | 46.0°F (2006) | 3.14 in (2009) |
| September 22 | 90.0°F (2024) | 46.9°F (1999) | 1.60 in (2013) |
| September 23 | 89.1°F (2024) | 46.9°F (2006) | 0.65 in (2011) |
| September 24 | 89.1°F (2024) | 48.0°F (2012) | 1.38 in (2006) |
| September 25 | 87.1°F (2016) | 48.0°F (2012) | 3.72 in (2020) |
| September 26 | 89.1°F (2016) | 44.1°F (2000) | 2.84 in (2002) |
| September 27 | 88.0°F (2019) | 44.1°F (2000) | 1.20 in (2009) |
| September 28 | 87.1°F (2019) | 46.0°F (2001) | 1.72 in (1996) |
| September 29 | 84.9°F (2019) | 45.0°F (2003) | 0.74 in (1996) |
| September 30 | 88.0°F (2019) | 45.0°F (1999) | 0.67 in (2015) |