September weather in Arnolds Park, IA
The average temperature in Arnolds Park in September is 62.8°F (51.8°F–73.9°F). Average precipitation: 3.21 inches.
September is a fall month in Arnolds Park, and is warmer than the annual average of 46°F. Daily temperatures swing about 22.1°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
73.9°F
Avg Low
51.8°F
Precipitation
3.21 in
Daylight
12h 17m
September records in Arnolds Park
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (1922) | 37.0°F (1949) | 1.22 in (1961) |
| September 2 | 95.0°F (1947) | 39.0°F (1980) | 1.20 in (1963) |
| September 3 | 96.1°F (1947) | 32.0°F (1974) | 2.30 in (1920) |
| September 4 | 93.0°F (2023) | 39.0°F (1974) | 3.50 in (2018) |
| September 5 | 93.9°F (1922) | 34.0°F (1965) | 1.57 in (1985) |
| September 6 | 100.0°F (1976) | 37.0°F (1956) | 0.92 in (1972) |
| September 7 | 95.0°F (1959) | 37.9°F (1986) | 3.00 in (1964) |
| September 8 | 99.0°F (1947) | 37.0°F (2010) | 4.00 in (1964) |
| September 9 | 96.1°F (1947) | 37.9°F (1995) | 1.77 in (1946) |
| September 10 | 93.0°F (2012) | 37.9°F (1959) | 1.11 in (1982) |
| September 11 | 95.0°F (1948) | 32.0°F (1955) | 0.49 in (1991) |
| September 12 | 97.0°F (1948) | 34.0°F (1975) | 2.42 in (1982) |
| September 13 | 90.0°F (1955) | 32.0°F (1963) | 1.95 in (1979) |
| September 14 | 90.0°F (2018) | 33.1°F (2011) | 3.08 in (2004) |
| September 15 | 98.1°F (1955) | 30.9°F (2011) | 5.95 in (2004) |
| September 16 | 95.0°F (1955) | 35.1°F (1981) | 3.75 in (2016) |
| September 17 | 95.0°F (1955) | 33.1°F (1981) | 1.20 in (2019) |
| September 18 | 91.9°F (1947) | 34.0°F (2012) | 2.81 in (1926) |
| September 19 | 95.0°F (1948) | 28.9°F (1991) | 1.32 in (1995) |
| September 20 | 95.0°F (2022) | 30.9°F (1962) | 2.95 in (2018) |
| September 21 | 91.0°F (2005) | 27.0°F (1983) | 4.50 in (2018) |
| September 22 | 91.0°F (2016) | 26.1°F (1974) | 1.85 in (1959) |
| September 23 | 86.0°F (2007) | 24.1°F (1983) | 1.60 in (1920) |
| September 24 | 86.0°F (2017) | 28.9°F (1965) | 1.87 in (1979) |
| September 25 | 90.0°F (1956) | 27.0°F (1926) | 4.01 in (2005) |
| September 26 | 91.0°F (1956) | 24.1°F (1984) | 1.15 in (1973) |
| September 27 | 93.0°F (1956) | 28.0°F (2012) | 1.50 in (1965) |
| September 28 | 84.0°F (1952) | 28.0°F (1951) | 1.06 in (1968) |
| September 29 | 88.0°F (2023) | 28.0°F (1984) | 2.39 in (1973) |
| September 30 | 90.0°F (2023) | 28.0°F (1974) | 2.24 in (1977) |