September weather in Marshalltown, IA
The average temperature in Marshalltown in September is °F (°F–°F). Average precipitation: 3.48 inches.
September is a fall month in Marshalltown, and is cooler than the annual average of 0°F. Daylight averages about 12h 16m.
Avg High
°F
Avg Low
°F
Precipitation
3.48 in
Daylight
12h 16m
September records in Marshalltown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.9°F (1991) | 53.1°F (1994) | 1.80 in (2014) |
| September 2 | 90.0°F (1991) | 57.0°F (1994) | 1.78 in (2018) |
| September 3 | 81.0°F (1991) | 54.0°F (1991) | 0.39 in (1991) |
| September 4 | 81.0°F (1992) | 53.1°F (1991) | 3.05 in (2018) |
| September 5 | 79.0°F (1992) | 53.1°F (1991) | 1.07 in (1971) |
| September 6 | 88.0°F (1991) | 52.0°F (1994) | 0.40 in (2020) |
| September 7 | 88.0°F (1991) | 48.9°F (1992) | 1.55 in (2012) |
| September 8 | 82.0°F (1994) | 48.9°F (1992) | 1.50 in (2016) |
| September 9 | 89.1°F (1994) | 50.0°F (1992) | 1.28 in (1989) |
| September 10 | 89.1°F (1994) | 46.9°F (1992) | 1.62 in (2014) |
| September 11 | 86.0°F (1994) | 46.0°F (1992) | 0.77 in (2022) |
| September 12 | 89.1°F (1993) | 55.0°F (1992) | 1.53 in (1991) |
| September 13 | 91.0°F (1994) | 48.0°F (1993) | 1.13 in (1991) |
| September 14 | 93.0°F (1994) | 42.1°F (1993) | 1.58 in (1993) |
| September 15 | 90.0°F (1994) | 42.1°F (1993) | 0.69 in (1992) |
| September 16 | 86.0°F (1992) | 46.9°F (1993) | 2.38 in (2016) |
| September 17 | 84.9°F (1992) | 46.0°F (1993) | 0.76 in (2017) |
| September 18 | 81.0°F (1994) | 37.0°F (1991) | 1.03 in (2025) |
| September 19 | 84.0°F (1994) | 34.0°F (1991) | 0.90 in (1988) |
| September 20 | 84.0°F (1994) | 36.0°F (1991) | 1.03 in (2013) |
| September 21 | 81.0°F (1994) | 39.9°F (1991) | 0.33 in (1992) |
| September 22 | 73.9°F (1993) | 44.1°F (1992) | 2.28 in (1994) |
| September 23 | 68.0°F (1992) | 42.1°F (1991) | 1.53 in (2016) |
| September 24 | 68.0°F (1992) | 43.0°F (1991) | 0.63 in (2016) |
| September 25 | 72.0°F (1992) | 42.1°F (1991) | 2.52 in (1994) |
| September 26 | 64.0°F (1991) | 39.9°F (1991) | 1.37 in (1993) |
| September 27 | 73.9°F (1992) | 41.0°F (1991) | 0.20 in (1992) |
| September 28 | 70.0°F (1994) | 35.1°F (1992) | 0.62 in (2020) |
| September 29 | 82.9°F (1991) | 35.1°F (1992) | 0.47 in (2015) |
| September 30 | 87.1°F (1994) | 42.1°F (1992) | 0.22 in (2018) |