September weather in Graettinger, IA
The average temperature in Graettinger in September is 63.5°F (51.2°F–75.7°F). Average precipitation: 3.40 inches.
September is a fall month in Graettinger, and is warmer than the annual average of 47.3°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
75.7°F
Avg Low
51.2°F
Precipitation
3.40 in
Daylight
12h 17m
September records in Graettinger
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (1894) | 39.0°F (1949) | 1.81 in (2014) |
| September 2 | 95.0°F (1947) | 41.0°F (1967) | 0.85 in (1957) |
| September 3 | 96.1°F (1947) | 36.0°F (1974) | 0.55 in (1962) |
| September 4 | 93.9°F (2023) | 36.0°F (1974) | 2.11 in (1989) |
| September 5 | 95.0°F (2023) | 37.0°F (2018) | 3.74 in (2018) |
| September 6 | 98.1°F (1970) | 37.9°F (1962) | 1.65 in (1965) |
| September 7 | 98.1°F (1978) | 37.9°F (1895) | 2.07 in (2016) |
| September 8 | 99.0°F (1947) | 39.9°F (1992) | 4.10 in (1964) |
| September 9 | 97.0°F (1955) | 39.9°F (2008) | 1.30 in (1951) |
| September 10 | 96.1°F (1895) | 39.9°F (1948) | 4.00 in (1900) |
| September 11 | 95.0°F (1895) | 35.1°F (1955) | 1.47 in (2019) |
| September 12 | 93.0°F (2012) | 33.1°F (1955) | 2.61 in (1978) |
| September 13 | 90.0°F (1994) | 34.0°F (1963) | 1.59 in (1982) |
| September 14 | 98.1°F (2025) | 37.9°F (1949) | 0.83 in (1978) |
| September 15 | 97.0°F (1955) | 32.0°F (2011) | 5.75 in (2004) |
| September 16 | 95.0°F (1955) | 33.1°F (1984) | 2.41 in (2016) |
| September 17 | 98.1°F (1895) | 37.0°F (1980) | 0.80 in (1900) |
| September 18 | 93.9°F (1947) | 34.0°F (1894) | 2.17 in (1983) |
| September 19 | 97.0°F (1948) | 30.9°F (1991) | 1.75 in (1995) |
| September 20 | 90.0°F (1970) | 28.9°F (1991) | 3.68 in (2018) |
| September 21 | 93.9°F (2022) | 28.9°F (1983) | 6.40 in (1950) |
| September 22 | 93.0°F (2016) | 24.1°F (1995) | 1.42 in (1968) |
| September 23 | 91.9°F (2017) | 27.0°F (1983) | 2.13 in (2016) |
| September 24 | 89.1°F (2017) | 26.1°F (1942) | 1.60 in (2010) |
| September 25 | 90.0°F (1956) | 30.0°F (1942) | 2.20 in (2005) |
| September 26 | 91.9°F (1956) | 24.1°F (1984) | 1.69 in (1973) |
| September 27 | 93.0°F (1956) | 24.1°F (1942) | 1.64 in (1965) |
| September 28 | 91.0°F (1894) | 18.0°F (1942) | 0.90 in (1968) |
| September 29 | 84.9°F (1991) | 26.1°F (1984) | 1.33 in (1988) |
| September 30 | 91.0°F (1952) | 24.1°F (1895) | 0.85 in (1962) |