September weather in Old Town, ME
The average temperature in Old Town in September is 57.7°F (45.7°F–69.8°F). Average precipitation: 3.67 inches.
September is a fall month in Old Town, and is warmer than the annual average of 43.2°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
69.8°F
Avg Low
45.7°F
Precipitation
3.67 in
Daylight
12h 18m
September records in Old Town
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 92.8°F (2010) | 39.0°F (2009) | 1.43 in (2013) |
| September 2 | 91.8°F (2010) | 39.4°F (2007) | 2.15 in (2013) |
| September 3 | 90.5°F (2010) | 39.6°F (2003) | 0.70 in (2017) |
| September 4 | 83.3°F (2008) | 45.1°F (2016) | 3.31 in (2010) |
| September 5 | 86.9°F (2023) | 38.8°F (2007) | 3.53 in (2012) |
| September 6 | 85.6°F (2015) | 36.3°F (2007) | 1.06 in (2025) |
| September 7 | 89.1°F (2015) | 36.1°F (2009) | 1.42 in (2008) |
| September 8 | 87.6°F (2007) | 39.4°F (2018) | 0.45 in (2013) |
| September 9 | 88.2°F (2016) | 32.0°F (2018) | 2.26 in (2021) |
| September 10 | 81.3°F (2016) | 33.4°F (2018) | 1.20 in (2021) |
| September 11 | 84.4°F (2013) | 33.8°F (2008) | 0.80 in (2018) |
| September 12 | 82.2°F (2022) | 34.3°F (2006) | 0.30 in (2013) |
| September 13 | 79.9°F (2012) | 34.2°F (2014) | 1.24 in (2013) |
| September 14 | 81.7°F (2017) | 34.0°F (2004) | 0.51 in (2015) |
| September 15 | 82.0°F (2003) | 32.7°F (2014) | 0.79 in (2011) |
| September 16 | 82.0°F (2015) | 34.5°F (2007) | 1.78 in (2023) |
| September 17 | 84.4°F (2015) | 30.4°F (2007) | 1.33 in (2005) |
| September 18 | 83.5°F (2015) | 31.6°F (2007) | 0.94 in (2004) |
| September 19 | 79.7°F (2024) | 27.1°F (2014) | 0.68 in (2012) |
| September 20 | 77.4°F (2019) | 26.4°F (2020) | 0.75 in (2022) |
| September 21 | 80.2°F (2002) | 25.0°F (2020) | 0.15 in (2012) |
| September 22 | 77.9°F (2002) | 27.1°F (2020) | 2.07 in (2022) |
| September 23 | 81.9°F (2017) | 28.8°F (2008) | 0.93 in (2002) |
| September 24 | 86.2°F (2017) | 30.7°F (2018) | 0.93 in (2019) |
| September 25 | 86.9°F (2017) | 29.3°F (2018) | 2.06 in (2025) |
| September 26 | 88.7°F (2007) | 26.4°F (2009) | 1.19 in (2021) |
| September 27 | 83.3°F (2017) | 31.3°F (2015) | 1.21 in (2008) |
| September 28 | 82.0°F (2014) | 31.5°F (2012) | 2.62 in (2003) |
| September 29 | 78.4°F (2010) | 31.8°F (2002) | 0.72 in (2006) |
| September 30 | 73.0°F (2020) | 30.2°F (2007) | 5.40 in (2015) |