September weather in Bath, ME
The average temperature in Bath in September is 59.3°F (48.2°F–70.5°F). Average precipitation: 3.92 inches.
September is a fall month in Bath, and is warmer than the annual average of 44.6°F. Daily temperatures swing about 22.3°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
70.5°F
Avg Low
48.2°F
Precipitation
3.92 in
Daylight
12h 17m
September records in Bath
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 84.0°F (2015) | 43.0°F (2017) | 0.56 in (2001) |
| September 2 | 84.9°F (2014) | 39.9°F (2017) | 1.66 in (2013) |
| September 3 | 84.9°F (2015) | 39.0°F (2017) | 1.51 in (2013) |
| September 4 | 87.1°F (2018) | 46.0°F (2022) | 1.64 in (2010) |
| September 5 | 86.0°F (2022) | 45.0°F (2020) | 1.12 in (2012) |
| September 6 | 87.1°F (2023) | 39.9°F (2013) | 1.18 in (1994) |
| September 7 | 89.1°F (2018) | 41.0°F (2013) | 5.80 in (2008) |
| September 8 | 87.1°F (2015) | 45.0°F (2025) | 1.40 in (1997) |
| September 9 | 87.1°F (2015) | 37.9°F (2013) | 0.32 in (1996) |
| September 10 | 91.9°F (2016) | 39.9°F (2013) | 1.41 in (2004) |
| September 11 | 84.9°F (2022) | 39.0°F (2024) | 3.13 in (1999) |
| September 12 | 84.0°F (2013) | 39.0°F (2020) | 1.52 in (2007) |
| September 13 | 82.9°F (2022) | 39.0°F (2020) | 1.98 in (2013) |
| September 14 | 81.0°F (2017) | 39.9°F (2019) | 1.48 in (2013) |
| September 15 | 81.0°F (2016) | 34.0°F (2020) | 2.27 in (1996) |
| September 16 | 82.0°F (2015) | 34.0°F (2020) | 1.54 in (2002) |
| September 17 | 86.0°F (2018) | 35.1°F (2011) | 3.80 in (1999) |
| September 18 | 84.9°F (2015) | 35.1°F (2012) | 1.09 in (1995) |
| September 19 | 82.9°F (2024) | 33.1°F (2019) | 1.30 in (2023) |
| September 20 | 78.1°F (2024) | 32.0°F (2020) | 1.86 in (2022) |
| September 21 | 79.0°F (2019) | 28.9°F (2020) | 0.39 in (2005) |
| September 22 | 82.0°F (2019) | 30.9°F (2020) | 0.63 in (2001) |
| September 23 | 82.0°F (2016) | 36.0°F (2020) | 1.66 in (2002) |
| September 24 | 84.9°F (2017) | 37.0°F (2018) | 3.36 in (1994) |
| September 25 | 86.0°F (2017) | 35.1°F (2018) | 0.36 in (2010) |
| September 26 | 84.9°F (2017) | 32.0°F (2016) | 5.07 in (2021) |
| September 27 | 80.1°F (2011) | 33.1°F (2015) | 1.91 in (2008) |
| September 28 | 81.0°F (2014) | 32.0°F (2015) | 2.37 in (2008) |
| September 29 | 79.0°F (2014) | 37.0°F (2012) | 0.98 in (2008) |
| September 30 | 77.0°F (2025) | 32.0°F (2022) | 1.01 in (2015) |