September weather in Osage, IA
The average temperature in Osage in September is 61.7°F (50.3°F–73.0°F). Average precipitation: 3.51 inches.
September is a fall month in Osage, and is warmer than the annual average of 45.3°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
73.0°F
Avg Low
50.3°F
Precipitation
3.51 in
Daylight
12h 17m
September records in Osage
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1913) | 39.0°F (1949) | 2.88 in (1897) |
| September 2 | 98.1°F (1925) | 37.9°F (1946) | 1.90 in (1959) |
| September 3 | 97.0°F (1925) | 37.0°F (1952) | 1.11 in (1934) |
| September 4 | 98.1°F (1925) | 37.9°F (1974) | 1.24 in (1968) |
| September 5 | 100.9°F (1913) | 37.9°F (1962) | 4.39 in (1985) |
| September 6 | 97.0°F (1913) | 39.0°F (2025) | 1.78 in (1938) |
| September 7 | 98.1°F (1978) | 36.0°F (1956) | 2.77 in (2016) |
| September 8 | 99.0°F (1931) | 37.0°F (2025) | 2.54 in (1964) |
| September 9 | 99.0°F (1955) | 37.0°F (1949) | 1.56 in (1929) |
| September 10 | 99.0°F (1931) | 37.9°F (1907) | 1.87 in (1970) |
| September 11 | 95.0°F (1908) | 33.1°F (1955) | 1.73 in (1972) |
| September 12 | 96.1°F (2000) | 34.0°F (1955) | 1.90 in (1991) |
| September 13 | 97.0°F (1939) | 33.1°F (1953) | 3.07 in (1978) |
| September 14 | 98.1°F (1939) | 30.0°F (1949) | 1.47 in (1938) |
| September 15 | 97.0°F (1939) | 32.0°F (2007) | 2.50 in (1936) |
| September 16 | 95.0°F (1931) | 32.0°F (2007) | 1.43 in (2016) |
| September 17 | 93.9°F (1988) | 33.1°F (1980) | 2.25 in (1965) |
| September 18 | 91.9°F (1948) | 28.0°F (1929) | 2.20 in (1942) |
| September 19 | 95.0°F (1948) | 34.0°F (1902) | 3.45 in (2019) |
| September 20 | 93.0°F (1908) | 30.9°F (1956) | 5.17 in (1983) |
| September 21 | 93.9°F (1937) | 32.0°F (1995) | 2.01 in (1986) |
| September 22 | 95.0°F (1994) | 27.0°F (1913) | 3.44 in (2016) |
| September 23 | 93.0°F (2017) | 30.0°F (1983) | 0.93 in (1985) |
| September 24 | 91.0°F (2017) | 30.0°F (1942) | 1.32 in (2023) |
| September 25 | 90.0°F (2017) | 28.0°F (1926) | 2.49 in (1972) |
| September 26 | 87.1°F (1986) | 27.0°F (1926) | 2.00 in (1934) |
| September 27 | 86.0°F (1998) | 30.9°F (1942) | 1.55 in (1986) |
| September 28 | 86.0°F (1939) | 25.0°F (1942) | 1.81 in (1901) |
| September 29 | 84.9°F (1953) | 21.9°F (1949) | 2.49 in (1986) |
| September 30 | 90.0°F (1952) | 19.9°F (1899) | 2.30 in (1925) |