September weather in Ottosen, IA
The average temperature in Ottosen in September is 62.6°F (50.1°F–75.2°F). Average precipitation: 3.27 inches.
September is a fall month in Ottosen, and is warmer than the annual average of 45.9°F. Daily temperatures swing about 25.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
75.2°F
Avg Low
50.1°F
Precipitation
3.27 in
Daylight
12h 16m
September records in Ottosen
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1911) | 39.0°F (1974) | 1.86 in (2014) |
| September 2 | 97.0°F (1925) | 28.9°F (1893) | 2.19 in (1933) |
| September 3 | 97.0°F (2023) | 34.0°F (1974) | 1.65 in (1917) |
| September 4 | 99.0°F (1925) | 39.0°F (1974) | 1.35 in (1929) |
| September 5 | 96.1°F (1913) | 39.0°F (1909) | 4.02 in (2018) |
| September 6 | 99.0°F (1922) | 37.9°F (1965) | 2.10 in (1938) |
| September 7 | 99.0°F (1931) | 37.0°F (1956) | 2.73 in (2016) |
| September 8 | 99.0°F (1947) | 37.9°F (1995) | 5.43 in (1941) |
| September 9 | 96.1°F (1931) | 37.0°F (1924) | 1.43 in (2005) |
| September 10 | 98.1°F (1931) | 37.0°F (1917) | 1.60 in (1916) |
| September 11 | 99.0°F (1931) | 33.1°F (1955) | 2.15 in (1900) |
| September 12 | 98.1°F (1939) | 33.1°F (1955) | 1.98 in (1932) |
| September 13 | 98.1°F (1939) | 34.0°F (1974) | 4.25 in (1978) |
| September 14 | 99.0°F (1939) | 35.1°F (1923) | 2.62 in (1941) |
| September 15 | 99.0°F (1939) | 32.0°F (1916) | 2.06 in (2004) |
| September 16 | 93.9°F (1955) | 30.9°F (2011) | 3.57 in (1906) |
| September 17 | 93.0°F (1925) | 30.9°F (1916) | 1.62 in (1968) |
| September 18 | 93.0°F (1947) | 27.0°F (1929) | 5.10 in (1926) |
| September 19 | 97.0°F (1948) | 30.9°F (1991) | 2.13 in (1995) |
| September 20 | 97.0°F (1998) | 30.0°F (1918) | 3.25 in (2018) |
| September 21 | 95.0°F (1937) | 30.9°F (1999) | 1.71 in (2018) |
| September 22 | 93.9°F (2016) | 25.0°F (1913) | 1.36 in (1994) |
| September 23 | 91.0°F (1938) | 28.9°F (1974) | 2.32 in (2016) |
| September 24 | 87.1°F (1930) | 28.9°F (1942) | 1.31 in (2010) |
| September 25 | 89.1°F (1956) | 27.0°F (1893) | 2.83 in (1972) |
| September 26 | 91.9°F (2020) | 28.0°F (1984) | 2.20 in (1924) |
| September 27 | 93.0°F (1956) | 28.9°F (1942) | 0.90 in (1902) |
| September 28 | 90.0°F (1956) | 21.9°F (1942) | 1.95 in (1901) |
| September 29 | 87.1°F (2021) | 24.1°F (1899) | 2.06 in (1988) |
| September 30 | 91.0°F (1952) | 27.0°F (1939) | 3.45 in (1923) |