September weather in Blairstown, IA
The average temperature in Blairstown in September is 63.5°F (51.1°F–75.8°F). Average precipitation: 3.55 inches.
September is a fall month in Blairstown, and is warmer than the annual average of 48.2°F. Daily temperatures swing about 24.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
75.8°F
Avg Low
51.1°F
Precipitation
3.55 in
Daylight
12h 16m
September records in Blairstown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1913) | 37.0°F (1949) | 3.26 in (2018) |
| September 2 | 100.9°F (1925) | 39.0°F (1946) | 1.54 in (1942) |
| September 3 | 100.0°F (1913) | 37.9°F (1952) | 3.05 in (1958) |
| September 4 | 104.0°F (1925) | 37.0°F (1974) | 2.40 in (2011) |
| September 5 | 100.9°F (1925) | 39.0°F (1962) | 3.50 in (1898) |
| September 6 | 102.9°F (1922) | 37.0°F (1988) | 1.09 in (1983) |
| September 7 | 102.0°F (1922) | 36.0°F (1956) | 2.73 in (2007) |
| September 8 | 102.0°F (1947) | 34.0°F (1986) | 3.24 in (1941) |
| September 9 | 100.0°F (1933) | 37.0°F (1924) | 1.66 in (1970) |
| September 10 | 99.0°F (2013) | 12.0°F (1905) | 1.50 in (2014) |
| September 11 | 96.1°F (1931) | 30.9°F (1917) | 1.80 in (2020) |
| September 12 | 97.0°F (1927) | 32.0°F (1955) | 2.79 in (1961) |
| September 13 | 96.1°F (1897) | 34.0°F (1902) | 2.51 in (1978) |
| September 14 | 96.1°F (1927) | 34.0°F (1929) | 4.75 in (1914) |
| September 15 | 97.0°F (1927) | 32.0°F (2007) | 2.28 in (1970) |
| September 16 | 98.1°F (1931) | 30.0°F (1937) | 5.26 in (1921) |
| September 17 | 98.1°F (1927) | 30.9°F (1916) | 1.30 in (1970) |
| September 18 | 93.9°F (1955) | 28.0°F (1916) | 2.45 in (1977) |
| September 19 | 96.1°F (1948) | 32.0°F (1991) | 3.74 in (1926) |
| September 20 | 93.0°F (1931) | 28.0°F (1896) | 2.89 in (1978) |
| September 21 | 96.1°F (2022) | 28.9°F (1918) | 1.17 in (1965) |
| September 22 | 95.0°F (1937) | 25.0°F (1913) | 4.22 in (1946) |
| September 23 | 91.9°F (2017) | 27.0°F (2012) | 2.77 in (1902) |
| September 24 | 93.0°F (2017) | 24.1°F (2012) | 1.68 in (1986) |
| September 25 | 91.9°F (1920) | 27.0°F (2012) | 3.55 in (1930) |
| September 26 | 93.9°F (1920) | 26.1°F (1893) | 3.36 in (1915) |
| September 27 | 91.9°F (1954) | 28.0°F (1928) | 1.85 in (1907) |
| September 28 | 99.0°F (1953) | 24.1°F (1942) | 1.75 in (1900) |
| September 29 | 93.0°F (1953) | 25.0°F (1916) | 1.65 in (1954) |
| September 30 | 93.0°F (1952) | 23.0°F (1899) | 1.77 in (1925) |