September weather in Allison, IA
The average temperature in Allison in September is 62.8°F (51.2°F–74.3°F). Average precipitation: 3.37 inches.
September is a fall month in Allison, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 23.1°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
74.3°F
Avg Low
51.2°F
Precipitation
3.37 in
Daylight
12h 16m
September records in Allison
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (1953) | 35.1°F (1949) | 1.60 in (1936) |
| September 2 | 98.1°F (1925) | 39.9°F (1946) | 1.96 in (1942) |
| September 3 | 100.9°F (1939) | 35.1°F (1974) | 2.75 in (2018) |
| September 4 | 100.0°F (1925) | 39.0°F (1928) | 3.69 in (1920) |
| September 5 | 96.1°F (2012) | 37.9°F (1918) | 2.10 in (1936) |
| September 6 | 100.0°F (1922) | 37.9°F (1986) | 2.51 in (1938) |
| September 7 | 100.0°F (1939) | 39.0°F (1956) | 1.65 in (1917) |
| September 8 | 97.0°F (1933) | 39.0°F (1995) | 4.72 in (1941) |
| September 9 | 99.0°F (1955) | 35.1°F (1924) | 2.83 in (1940) |
| September 10 | 97.0°F (2013) | 35.1°F (1917) | 3.25 in (2016) |
| September 11 | 93.9°F (1931) | 34.0°F (1917) | 4.00 in (2006) |
| September 12 | 100.0°F (1939) | 35.1°F (1975) | 1.11 in (2003) |
| September 13 | 96.1°F (1939) | 35.1°F (1923) | 2.80 in (1978) |
| September 14 | 95.0°F (1939) | 30.0°F (1923) | 2.20 in (1938) |
| September 15 | 95.0°F (1939) | 33.1°F (1916) | 2.45 in (1936) |
| September 16 | 96.1°F (1931) | 32.0°F (1937) | 2.87 in (1921) |
| September 17 | 95.0°F (1925) | 30.9°F (1916) | 1.02 in (1923) |
| September 18 | 95.0°F (1988) | 34.0°F (1916) | 2.47 in (1977) |
| September 19 | 97.0°F (1948) | 33.1°F (1991) | 2.80 in (1931) |
| September 20 | 90.0°F (1919) | 30.0°F (1991) | 4.12 in (1983) |
| September 21 | 93.0°F (2022) | 30.0°F (1918) | 1.23 in (1914) |
| September 22 | 95.0°F (1937) | 28.9°F (1974) | 1.45 in (2016) |
| September 23 | 91.0°F (2017) | 28.9°F (1983) | 2.51 in (2023) |
| September 24 | 91.0°F (2017) | 30.0°F (1942) | 1.20 in (1960) |
| September 25 | 91.0°F (2017) | 28.0°F (1926) | 2.06 in (1931) |
| September 26 | 87.1°F (1956) | 25.0°F (1926) | 2.70 in (2017) |
| September 27 | 87.1°F (2021) | 30.0°F (1934) | 1.55 in (1965) |
| September 28 | 90.0°F (1939) | 25.0°F (1942) | 1.75 in (1972) |
| September 29 | 89.1°F (1953) | 27.0°F (1916) | 1.37 in (1985) |
| September 30 | 91.9°F (1952) | 27.0°F (1939) | 1.80 in (1925) |