September weather in Ankeny, IA
The average temperature in Ankeny in September is 65.0°F (52.9°F–77.1°F). Average precipitation: 3.62 inches.
September is a fall month in Ankeny, and is warmer than the annual average of 49.5°F. Daily temperatures swing about 24.2°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
77.1°F
Avg Low
52.9°F
Precipitation
3.62 in
Daylight
12h 16m
September records in Ankeny
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (2000) | 39.9°F (1999) | 1.97 in (2014) |
| September 2 | 99.0°F (2011) | 42.1°F (1999) | 0.58 in (2015) |
| September 3 | 98.1°F (2000) | 37.0°F (1974) | 1.32 in (1964) |
| September 4 | 98.1°F (2000) | 39.0°F (1974) | 1.27 in (1977) |
| September 5 | 97.0°F (1952) | 37.9°F (1962) | 1.95 in (1979) |
| September 6 | 96.1°F (1985) | 39.9°F (1962) | 1.55 in (2004) |
| September 7 | 98.1°F (1978) | 37.9°F (1956) | 3.92 in (2007) |
| September 8 | 96.1°F (1983) | 42.1°F (1986) | 2.36 in (2016) |
| September 9 | 99.0°F (1955) | 37.9°F (1995) | 1.75 in (1951) |
| September 10 | 100.0°F (2013) | 39.9°F (1976) | 1.83 in (2014) |
| September 11 | 96.1°F (2013) | 37.9°F (1955) | 1.66 in (2006) |
| September 12 | 98.1°F (2000) | 36.0°F (1955) | 3.69 in (1961) |
| September 13 | 93.0°F (2011) | 35.1°F (2014) | 1.86 in (1978) |
| September 14 | 91.9°F (2000) | 34.0°F (1996) | 1.09 in (1993) |
| September 15 | 96.1°F (1955) | 33.1°F (2007) | 1.32 in (1970) |
| September 16 | 93.9°F (1955) | 33.1°F (2007) | 2.83 in (2016) |
| September 17 | 93.0°F (1953) | 36.0°F (1980) | 1.50 in (2017) |
| September 18 | 93.9°F (1955) | 32.0°F (1999) | 1.17 in (1977) |
| September 19 | 93.9°F (2000) | 35.1°F (1991) | 2.05 in (2010) |
| September 20 | 90.0°F (1972) | 32.0°F (1991) | 2.10 in (1978) |
| September 21 | 91.0°F (2005) | 21.9°F (1999) | 0.52 in (1955) |
| September 22 | 93.0°F (2005) | 26.1°F (1999) | 1.53 in (2019) |
| September 23 | 91.0°F (2017) | 28.9°F (1983) | 1.48 in (1985) |
| September 24 | 91.0°F (2017) | 28.9°F (1989) | 0.80 in (1960) |
| September 25 | 91.0°F (2017) | 30.9°F (1989) | 1.70 in (1994) |
| September 26 | 88.0°F (1998) | 28.0°F (1984) | 1.65 in (1993) |
| September 27 | 91.0°F (1956) | 34.0°F (1989) | 1.30 in (1965) |
| September 28 | 97.0°F (1953) | 30.0°F (1951) | 1.62 in (1954) |
| September 29 | 95.0°F (1953) | 27.0°F (1984) | 2.29 in (1973) |
| September 30 | 91.9°F (1952) | 28.9°F (1972) | 0.96 in (1995) |