September weather in Chelsea, MA
The average temperature in Chelsea in September is 65.6°F (58.2°F–73.1°F). Average precipitation: 3.56 inches.
September is a fall month in Chelsea, and is warmer than the annual average of 51.9°F. Daily temperatures swing about 14.9°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
73.1°F
Avg Low
58.2°F
Precipitation
3.56 in
Daylight
12h 16m
September records in Chelsea
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (1969) | 52.0°F (1975) | 2.11 in (1949) |
| September 2 | 100.0°F (1953) | 48.9°F (1967) | 2.71 in (1947) |
| September 3 | 96.1°F (2018) | 50.0°F (1994) | 3.15 in (1972) |
| September 4 | 93.9°F (1973) | 50.0°F (1945) | 1.22 in (1966) |
| September 5 | 91.9°F (1971) | 48.9°F (2000) | 0.89 in (1991) |
| September 6 | 97.0°F (2018) | 48.9°F (2000) | 1.86 in (2008) |
| September 7 | 95.0°F (1945) | 46.9°F (1962) | 1.12 in (1974) |
| September 8 | 96.1°F (2015) | 48.0°F (1978) | 1.65 in (2004) |
| September 9 | 93.0°F (2015) | 45.0°F (1938) | 2.19 in (1969) |
| September 10 | 91.9°F (1961) | 46.9°F (1938) | 4.71 in (1999) |
| September 11 | 99.0°F (1983) | 46.9°F (1967) | 5.63 in (1954) |
| September 12 | 93.0°F (1961) | 46.0°F (1967) | 2.95 in (1960) |
| September 13 | 93.0°F (1957) | 45.0°F (1985) | 2.30 in (1987) |
| September 14 | 90.0°F (1981) | 43.0°F (1963) | 2.46 in (1944) |
| September 15 | 91.0°F (1993) | 44.1°F (1963) | 1.14 in (1961) |
| September 16 | 96.1°F (1939) | 42.1°F (1984) | 3.16 in (1999) |
| September 17 | 89.1°F (1991) | 44.1°F (2013) | 2.77 in (1995) |
| September 18 | 90.0°F (1955) | 44.1°F (1943) | 2.87 in (2004) |
| September 19 | 91.9°F (1983) | 44.1°F (1943) | 1.21 in (1936) |
| September 20 | 97.0°F (1983) | 42.1°F (1964) | 2.13 in (1960) |
| September 21 | 88.0°F (1965) | 41.0°F (1956) | 2.77 in (1961) |
| September 22 | 91.0°F (1970) | 42.1°F (1962) | 1.88 in (1998) |
| September 23 | 91.9°F (1970) | 39.9°F (1947) | 2.64 in (1994) |
| September 24 | 90.0°F (1959) | 39.0°F (1963) | 1.25 in (1955) |
| September 25 | 88.0°F (1970) | 37.9°F (1950) | 2.90 in (1961) |
| September 26 | 93.0°F (2007) | 41.0°F (1936) | 1.65 in (2008) |
| September 27 | 86.0°F (1998) | 37.0°F (1947) | 2.37 in (1962) |
| September 28 | 87.1°F (2014) | 37.0°F (1947) | 1.88 in (2004) |
| September 29 | 88.0°F (1952) | 37.9°F (2000) | 1.55 in (1974) |
| September 30 | 87.1°F (1986) | 39.0°F (1942) | 2.46 in (2015) |