September weather in Waterville, ME
The average temperature in Waterville in September is 60.6°F (49.5°F–71.7°F). Average precipitation: 3.82 inches.
September is a fall month in Waterville, and is warmer than the annual average of 45.2°F. Daily temperatures swing about 22.2°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
71.7°F
Avg Low
49.5°F
Precipitation
3.82 in
Daylight
12h 17m
September records in Waterville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2010) | 39.0°F (2002) | 0.83 in (2013) |
| September 2 | 93.9°F (2010) | 37.9°F (1971) | 1.78 in (1965) |
| September 3 | 93.0°F (2010) | 37.9°F (1970) | 1.76 in (1959) |
| September 4 | 95.0°F (1999) | 37.0°F (1987) | 2.35 in (1972) |
| September 5 | 91.0°F (1999) | 36.0°F (1963) | 2.38 in (2012) |
| September 6 | 90.0°F (1983) | 37.9°F (1960) | 1.38 in (2017) |
| September 7 | 89.1°F (1998) | 35.1°F (1962) | 2.55 in (2008) |
| September 8 | 95.0°F (1960) | 34.0°F (1984) | 0.89 in (1998) |
| September 9 | 93.9°F (1960) | 37.0°F (1980) | 2.18 in (1969) |
| September 10 | 96.1°F (2002) | 36.0°F (1978) | 2.01 in (1990) |
| September 11 | 95.0°F (2002) | 33.1°F (1988) | 3.65 in (1999) |
| September 12 | 93.0°F (1961) | 34.0°F (1985) | 1.70 in (1971) |
| September 13 | 84.0°F (1974) | 33.1°F (1985) | 1.37 in (1960) |
| September 14 | 84.9°F (1961) | 30.9°F (1963) | 1.92 in (1977) |
| September 15 | 84.0°F (1993) | 32.0°F (1963) | 3.00 in (1996) |
| September 16 | 86.0°F (1993) | 30.9°F (1964) | 0.73 in (1986) |
| September 17 | 86.0°F (1992) | 34.0°F (1959) | 5.68 in (1999) |
| September 18 | 86.0°F (1991) | 30.9°F (1982) | 0.98 in (1958) |
| September 19 | 84.9°F (1968) | 28.9°F (2025) | 1.44 in (2023) |
| September 20 | 89.1°F (1985) | 28.9°F (1979) | 1.68 in (2022) |
| September 21 | 91.0°F (1978) | 28.9°F (2020) | 1.15 in (1971) |
| September 22 | 91.9°F (1965) | 30.0°F (1962) | 1.30 in (1983) |
| September 23 | 89.1°F (1965) | 34.0°F (1979) | 1.97 in (1981) |
| September 24 | 84.9°F (1959) | 28.9°F (1963) | 1.97 in (1994) |
| September 25 | 88.0°F (2017) | 30.0°F (1963) | 1.70 in (1991) |
| September 26 | 88.0°F (2017) | 32.0°F (1978) | 2.70 in (1961) |
| September 27 | 91.0°F (2007) | 30.0°F (1966) | 1.43 in (1977) |
| September 28 | 86.0°F (2017) | 26.1°F (1965) | 1.20 in (2002) |
| September 29 | 84.0°F (2014) | 23.0°F (1980) | 1.73 in (1967) |
| September 30 | 81.0°F (1987) | 28.0°F (2000) | 1.42 in (2015) |