September weather in Exeter, MO
The average temperature in Exeter in September is 67.8°F (56.0°F–79.6°F). Average precipitation: 4.56 inches.
September is a fall month in Exeter, and is warmer than the annual average of 55.8°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
79.6°F
Avg Low
56.0°F
Precipitation
4.56 in
Daylight
12h 13m
September records in Exeter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1984) | 39.9°F (1915) | 1.90 in (1974) |
| September 2 | 99.0°F (1984) | 39.9°F (1919) | 3.14 in (2003) |
| September 3 | 100.9°F (1919) | 42.1°F (1974) | 1.77 in (2008) |
| September 4 | 102.0°F (1913) | 37.0°F (1974) | 4.00 in (2008) |
| September 5 | 102.0°F (1998) | 39.0°F (1974) | 1.91 in (1951) |
| September 6 | 100.0°F (1980) | 42.1°F (1974) | 1.08 in (2007) |
| September 7 | 100.0°F (1912) | 39.9°F (2011) | 2.28 in (2007) |
| September 8 | 99.0°F (1912) | 39.0°F (2024) | 2.27 in (1970) |
| September 9 | 98.1°F (1980) | 37.9°F (2024) | 2.50 in (2001) |
| September 10 | 97.0°F (1912) | 37.9°F (1976) | 2.45 in (1951) |
| September 11 | 93.0°F (1983) | 37.9°F (1919) | 1.27 in (1913) |
| September 12 | 95.0°F (1911) | 37.9°F (1919) | 1.99 in (1989) |
| September 13 | 97.0°F (1980) | 37.9°F (1919) | 1.53 in (1961) |
| September 14 | 97.0°F (2011) | 43.0°F (1919) | 3.85 in (1993) |
| September 15 | 96.1°F (1971) | 39.9°F (1916) | 3.36 in (2008) |
| September 16 | 95.0°F (1980) | 37.0°F (1916) | 1.52 in (1988) |
| September 17 | 97.0°F (1980) | 39.0°F (1981) | 2.85 in (1968) |
| September 18 | 91.9°F (2025) | 30.9°F (1981) | 1.84 in (1991) |
| September 19 | 91.9°F (1972) | 33.1°F (1981) | 2.10 in (1988) |
| September 20 | 93.0°F (2024) | 36.0°F (1991) | 2.17 in (2023) |
| September 21 | 93.0°F (2024) | 32.0°F (1983) | 3.75 in (2025) |
| September 22 | 93.9°F (2024) | 33.1°F (1982) | 1.79 in (1998) |
| September 23 | 90.0°F (1980) | 30.9°F (1983) | 2.77 in (1970) |
| September 24 | 89.1°F (1911) | 30.0°F (1989) | 2.97 in (1996) |
| September 25 | 90.0°F (1911) | 30.0°F (1995) | 4.26 in (1993) |
| September 26 | 90.0°F (1911) | 32.0°F (1912) | 2.75 in (1996) |
| September 27 | 98.1°F (1911) | 33.1°F (1985) | 1.76 in (1996) |
| September 28 | 88.0°F (1911) | 32.0°F (1967) | 1.11 in (1973) |
| September 29 | 90.0°F (1971) | 28.9°F (1967) | 1.48 in (1977) |
| September 30 | 90.0°F (1969) | 30.0°F (1984) | 5.05 in (1986) |