September weather in Rockland, ME
The average temperature in Rockland in September is 60.5°F (51.9°F–69.0°F). Average precipitation: 4.49 inches.
September is a fall month in Rockland, and is warmer than the annual average of 45.5°F. Daily temperatures swing about 17.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
69.0°F
Avg Low
51.9°F
Precipitation
4.49 in
Daylight
12h 17m
September records in Rockland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (2010) | 44.1°F (1979) | 0.47 in (1983) |
| September 2 | 90.0°F (2010) | 43.0°F (2017) | 1.31 in (2021) |
| September 3 | 90.0°F (2010) | 45.0°F (1992) | 1.15 in (1996) |
| September 4 | 89.1°F (2018) | 39.9°F (1987) | 2.40 in (2010) |
| September 5 | 82.9°F (2008) | 44.1°F (2000) | 1.53 in (2003) |
| September 6 | 88.0°F (2023) | 41.0°F (1988) | 1.35 in (1994) |
| September 7 | 89.1°F (2018) | 43.0°F (1984) | 5.70 in (2008) |
| September 8 | 88.0°F (2015) | 44.1°F (1980) | 0.53 in (2019) |
| September 9 | 87.1°F (2001) | 41.0°F (2013) | 1.65 in (1987) |
| September 10 | 90.0°F (2002) | 37.9°F (1981) | 1.83 in (2021) |
| September 11 | 89.1°F (2002) | 39.0°F (1995) | 2.64 in (2018) |
| September 12 | 89.1°F (2002) | 37.0°F (1985) | 2.07 in (2018) |
| September 13 | 89.1°F (2002) | 44.1°F (1978) | 0.61 in (2008) |
| September 14 | 81.0°F (2017) | 41.0°F (1978) | 2.48 in (1987) |
| September 15 | 80.1°F (1993) | 35.1°F (1986) | 3.01 in (1996) |
| September 16 | 81.0°F (1993) | 39.0°F (2007) | 1.61 in (2002) |
| September 17 | 82.0°F (2015) | 39.9°F (1984) | 3.20 in (1999) |
| September 18 | 84.9°F (2015) | 36.0°F (1990) | 1.90 in (1980) |
| September 19 | 84.0°F (1992) | 37.0°F (2014) | 1.46 in (1996) |
| September 20 | 78.1°F (1983) | 28.9°F (1979) | 2.18 in (2022) |
| September 21 | 82.9°F (1985) | 36.0°F (1993) | 4.05 in (1987) |
| September 22 | 82.9°F (1978) | 35.1°F (1984) | 1.40 in (1979) |
| September 23 | 79.0°F (2016) | 15.1°F (2000) | 1.63 in (1990) |
| September 24 | 84.0°F (2003) | 34.0°F (1997) | 4.75 in (1994) |
| September 25 | 86.0°F (2017) | 34.0°F (1980) | 6.35 in (1994) |
| September 26 | 82.0°F (2010) | 33.1°F (1987) | 3.15 in (1991) |
| September 27 | 84.9°F (2017) | 30.9°F (1987) | 1.98 in (1977) |
| September 28 | 82.0°F (2017) | 30.0°F (1989) | 1.88 in (2009) |
| September 29 | 81.0°F (2014) | 28.0°F (1980) | 0.72 in (2012) |
| September 30 | 78.1°F (2025) | 34.0°F (1980) | 3.03 in (2015) |