September weather in Mattoon, WI
The average temperature in Mattoon in September is 58.0°F (47.7°F–68.3°F). Average precipitation: 3.40 inches.
September is a fall month in Mattoon, and is warmer than the annual average of 41.4°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
68.3°F
Avg Low
47.7°F
Precipitation
3.40 in
Daylight
12h 18m
September records in Mattoon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (1894) | 30.0°F (1896) | 1.98 in (1914) |
| September 2 | 93.0°F (1953) | 30.0°F (1896) | 1.96 in (1961) |
| September 3 | 90.0°F (1929) | 28.9°F (1974) | 2.00 in (1963) |
| September 4 | 89.1°F (1925) | 32.0°F (1974) | 1.65 in (1941) |
| September 5 | 90.0°F (1912) | 35.1°F (1918) | 2.40 in (2018) |
| September 6 | 89.1°F (1901) | 33.1°F (1988) | 1.18 in (1958) |
| September 7 | 90.0°F (1976) | 28.9°F (1986) | 1.82 in (2015) |
| September 8 | 93.9°F (1933) | 32.0°F (1979) | 1.85 in (1922) |
| September 9 | 91.9°F (1897) | 33.1°F (1914) | 1.81 in (1968) |
| September 10 | 93.9°F (1931) | 28.0°F (1917) | 2.20 in (1938) |
| September 11 | 93.9°F (1895) | 30.9°F (1917) | 2.02 in (1975) |
| September 12 | 90.0°F (1931) | 28.0°F (1902) | 1.34 in (1951) |
| September 13 | 88.0°F (1939) | 28.0°F (1923) | 1.60 in (2003) |
| September 14 | 90.0°F (1939) | 24.1°F (1899) | 1.85 in (1911) |
| September 15 | 87.1°F (1939) | 27.0°F (2007) | 2.64 in (1994) |
| September 16 | 90.0°F (1948) | 30.0°F (1916) | 2.40 in (1920) |
| September 17 | 87.1°F (1948) | 28.9°F (1916) | 2.15 in (1997) |
| September 18 | 88.0°F (1908) | 28.0°F (1894) | 3.18 in (1940) |
| September 19 | 84.9°F (1908) | 30.9°F (1979) | 4.00 in (1907) |
| September 20 | 87.1°F (1908) | 21.9°F (1897) | 1.70 in (1931) |
| September 21 | 88.0°F (1908) | 26.1°F (1896) | 2.70 in (1970) |
| September 22 | 89.1°F (1937) | 21.0°F (1974) | 1.19 in (2016) |
| September 23 | 89.1°F (1937) | 24.1°F (1974) | 1.49 in (2010) |
| September 24 | 87.1°F (1937) | 23.0°F (1976) | 2.02 in (2010) |
| September 25 | 84.9°F (1908) | 24.1°F (1947) | 1.14 in (1960) |
| September 26 | 86.0°F (1908) | 21.0°F (1899) | 1.93 in (1972) |
| September 27 | 84.0°F (1894) | 19.9°F (1896) | 2.47 in (1959) |
| September 28 | 82.9°F (1952) | 21.9°F (1896) | 2.10 in (1901) |
| September 29 | 84.9°F (1897) | 21.9°F (1899) | 1.29 in (1972) |
| September 30 | 87.1°F (1897) | 12.9°F (1899) | 1.46 in (1985) |