September weather in Fort Madison, IA
The average temperature in Fort Madison in September is 67.1°F (57.2°F–77.1°F). Average precipitation: 3.51 inches.
September is a fall month in Fort Madison, and is warmer than the annual average of 52.3°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.1°F
Avg Low
57.2°F
Precipitation
3.51 in
Daylight
12h 15m
September records in Fort Madison
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1953) | 44.1°F (1967) | 2.28 in (2010) |
| September 2 | 100.0°F (2000) | 46.9°F (1974) | 1.00 in (1963) |
| September 3 | 96.1°F (1960) | 42.1°F (1974) | 1.46 in (1970) |
| September 4 | 98.1°F (1990) | 37.9°F (1974) | 2.09 in (2008) |
| September 5 | 97.0°F (1990) | 44.1°F (1962) | 2.27 in (1971) |
| September 6 | 97.0°F (1990) | 43.0°F (1962) | 2.85 in (1916) |
| September 7 | 96.1°F (1960) | 39.9°F (1956) | 4.50 in (1911) |
| September 8 | 96.1°F (1960) | 43.0°F (1956) | 1.61 in (1915) |
| September 9 | 97.0°F (2013) | 45.0°F (2008) | 2.00 in (1991) |
| September 10 | 95.0°F (1983) | 42.1°F (1976) | 2.11 in (1903) |
| September 11 | 97.0°F (2013) | 43.0°F (1959) | 1.46 in (1984) |
| September 12 | 93.9°F (1991) | 36.0°F (1975) | 1.68 in (2008) |
| September 13 | 93.9°F (2025) | 37.9°F (1953) | 4.33 in (1961) |
| September 14 | 97.0°F (2025) | 37.0°F (1974) | 3.00 in (1998) |
| September 15 | 91.9°F (2025) | 37.9°F (2007) | 1.21 in (2019) |
| September 16 | 91.0°F (1955) | 37.9°F (1984) | 1.47 in (1980) |
| September 17 | 93.0°F (1954) | 39.9°F (1984) | 0.99 in (1973) |
| September 18 | 93.0°F (1953) | 37.9°F (1973) | 1.75 in (1904) |
| September 19 | 93.9°F (1972) | 37.0°F (1991) | 1.49 in (2013) |
| September 20 | 91.9°F (2024) | 36.0°F (1962) | 2.00 in (1957) |
| September 21 | 89.1°F (1972) | 36.0°F (1983) | 1.40 in (2003) |
| September 22 | 91.9°F (2017) | 33.1°F (1974) | 3.96 in (1970) |
| September 23 | 99.0°F (2017) | 32.0°F (1983) | 2.47 in (1964) |
| September 24 | 95.0°F (2017) | 34.0°F (1983) | 3.35 in (1911) |
| September 25 | 91.0°F (2017) | 35.1°F (1975) | 1.40 in (1973) |
| September 26 | 90.0°F (1953) | 30.9°F (1984) | 2.20 in (1970) |
| September 27 | 90.0°F (1956) | 33.1°F (1984) | 1.70 in (1999) |
| September 28 | 95.0°F (1953) | 34.0°F (1961) | 3.10 in (1911) |
| September 29 | 96.1°F (1953) | 30.9°F (1984) | 3.85 in (1906) |
| September 30 | 91.0°F (2023) | 33.1°F (1984) | 1.56 in (1893) |