September weather in Calais, ME
The average temperature in Calais in September is 59.0°F (49.0°F–69.1°F). Average precipitation: 4.23 inches.
September is a fall month in Calais, and is warmer than the annual average of 44.2°F. Daily temperatures swing about 20.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
69.1°F
Avg Low
49.0°F
Precipitation
4.23 in
Daylight
12h 18m
September records in Calais
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2010) | 39.9°F (2002) | 0.86 in (2014) |
| September 2 | 95.0°F (2010) | 43.0°F (2003) | 3.85 in (2013) |
| September 3 | 91.9°F (1999) | 41.0°F (2003) | 1.01 in (2020) |
| September 4 | 84.0°F (2014) | 42.1°F (1995) | 2.39 in (2010) |
| September 5 | 86.0°F (2014) | 41.0°F (2000) | 3.48 in (2012) |
| September 6 | 87.1°F (2018) | 37.9°F (2000) | 1.03 in (2008) |
| September 7 | 89.1°F (2015) | 41.0°F (2009) | 4.03 in (2008) |
| September 8 | 88.0°F (2001) | 42.1°F (1995) | 0.82 in (1998) |
| September 9 | 89.1°F (2001) | 41.0°F (2003) | 2.39 in (1996) |
| September 10 | 93.9°F (2002) | 39.9°F (2009) | 0.81 in (2021) |
| September 11 | 82.0°F (2022) | 37.9°F (2009) | 2.88 in (2015) |
| September 12 | 82.0°F (2022) | 37.9°F (2006) | 0.84 in (2002) |
| September 13 | 82.9°F (2017) | 39.9°F (2014) | 1.61 in (1996) |
| September 14 | 81.0°F (2017) | 37.9°F (2004) | 1.15 in (1996) |
| September 15 | 84.0°F (2003) | 36.0°F (2001) | 0.69 in (2000) |
| September 16 | 84.9°F (2024) | 33.1°F (1995) | 4.23 in (2023) |
| September 17 | 87.1°F (2024) | 36.0°F (2007) | 2.40 in (1999) |
| September 18 | 88.0°F (2024) | 37.9°F (2007) | 0.87 in (1996) |
| September 19 | 80.1°F (2024) | 33.1°F (2008) | 0.91 in (2012) |
| September 20 | 77.0°F (2017) | 34.0°F (2014) | 2.87 in (2022) |
| September 21 | 79.0°F (2002) | 35.1°F (2020) | 1.54 in (2001) |
| September 22 | 82.0°F (2019) | 37.0°F (2008) | 2.77 in (2022) |
| September 23 | 82.0°F (2019) | 34.0°F (2008) | 0.76 in (1999) |
| September 24 | 79.0°F (2017) | 28.9°F (2008) | 0.66 in (2019) |
| September 25 | 80.1°F (2011) | 30.9°F (1995) | 1.53 in (2021) |
| September 26 | 90.0°F (2017) | 32.0°F (2009) | 1.50 in (2021) |
| September 27 | 78.1°F (2014) | 36.0°F (1996) | 1.95 in (2008) |
| September 28 | 84.0°F (2014) | 32.0°F (2000) | 1.73 in (2007) |
| September 29 | 80.1°F (2025) | 30.0°F (2000) | 3.02 in (2012) |
| September 30 | 75.9°F (2024) | 30.9°F (1995) | 4.15 in (2015) |