September weather in La Porte City, IA
The average temperature in La Porte City in September is 61.5°F (49.5°F–73.5°F). Average precipitation: 3.68 inches.
September is a fall month in La Porte City, and is warmer than the annual average of 46°F. Daily temperatures swing about 24°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
73.5°F
Avg Low
49.5°F
Precipitation
3.68 in
Daylight
12h 16m
September records in La Porte City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1953) | 34.0°F (1949) | 1.74 in (1897) |
| September 2 | 99.0°F (1953) | 39.9°F (1946) | 1.08 in (1942) |
| September 3 | 99.0°F (1947) | 37.0°F (1974) | 2.01 in (2018) |
| September 4 | 100.0°F (1947) | 36.0°F (1974) | 2.97 in (2018) |
| September 5 | 97.0°F (2023) | 39.0°F (1974) | 1.19 in (1971) |
| September 6 | 95.0°F (1947) | 36.0°F (1950) | 1.60 in (1983) |
| September 7 | 97.0°F (1985) | 36.0°F (2025) | 1.56 in (2007) |
| September 8 | 96.1°F (1947) | 35.1°F (2025) | 1.85 in (2001) |
| September 9 | 100.0°F (1955) | 39.0°F (1949) | 1.94 in (1942) |
| September 10 | 99.0°F (2013) | 35.1°F (1976) | 2.28 in (2016) |
| September 11 | 97.0°F (2013) | 35.1°F (1955) | 1.18 in (1963) |
| September 12 | 93.9°F (1952) | 33.1°F (1955) | 1.57 in (2020) |
| September 13 | 88.0°F (1952) | 32.0°F (1953) | 3.18 in (1961) |
| September 14 | 95.0°F (2025) | 36.0°F (1949) | 1.95 in (1896) |
| September 15 | 95.0°F (1955) | 30.9°F (2007) | 2.05 in (1970) |
| September 16 | 93.0°F (1955) | 30.9°F (1984) | 1.27 in (2016) |
| September 17 | 93.0°F (1955) | 37.0°F (1999) | 1.20 in (1987) |
| September 18 | 93.9°F (1947) | 34.0°F (1981) | 4.08 in (1977) |
| September 19 | 98.1°F (1948) | 33.1°F (1991) | 2.40 in (1988) |
| September 20 | 91.0°F (2024) | 28.9°F (1991) | 2.00 in (1963) |
| September 21 | 97.0°F (2022) | 28.0°F (1982) | 2.10 in (1950) |
| September 22 | 90.0°F (2017) | 26.1°F (1982) | 1.70 in (1973) |
| September 23 | 91.0°F (2017) | 28.9°F (1983) | 4.40 in (1946) |
| September 24 | 91.0°F (2017) | 30.0°F (1989) | 1.57 in (1986) |
| September 25 | 89.1°F (2017) | 30.9°F (1942) | 2.24 in (1984) |
| September 26 | 88.0°F (2017) | 28.0°F (1984) | 2.45 in (1981) |
| September 27 | 89.1°F (1954) | 26.1°F (2022) | 2.05 in (1959) |
| September 28 | 100.0°F (1953) | 21.9°F (1942) | 1.00 in (1954) |
| September 29 | 96.1°F (1953) | 23.0°F (1984) | 2.30 in (2015) |
| September 30 | 91.9°F (1952) | 25.0°F (1984) | 2.10 in (1961) |