September weather in Eagle River, WI
The average temperature in Eagle River in September is 55.9°F (44.3°F–67.4°F). Average precipitation: 3.61 inches.
September is a fall month in Eagle River, and is warmer than the annual average of 40°F. Daily temperatures swing about 23.1°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
67.4°F
Avg Low
44.3°F
Precipitation
3.61 in
Daylight
12h 18m
September records in Eagle River
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2008) | 35.1°F (1994) | 2.59 in (1948) |
| September 2 | 86.0°F (2023) | 37.0°F (2016) | 1.73 in (1984) |
| September 3 | 90.0°F (2023) | 37.9°F (1998) | 1.79 in (2015) |
| September 4 | 91.9°F (2023) | 36.0°F (1997) | 1.52 in (2014) |
| September 5 | 87.1°F (2023) | 36.0°F (2000) | 2.77 in (2018) |
| September 6 | 87.1°F (2007) | 35.1°F (2011) | 1.08 in (1990) |
| September 7 | 84.0°F (1945) | 32.0°F (2024) | 3.73 in (2001) |
| September 8 | 86.0°F (1945) | 28.0°F (1944) | 0.76 in (1989) |
| September 9 | 86.0°F (2003) | 34.0°F (2017) | 1.47 in (1951) |
| September 10 | 86.0°F (2002) | 33.1°F (1995) | 1.95 in (2025) |
| September 11 | 89.1°F (2005) | 30.0°F (2020) | 1.22 in (1986) |
| September 12 | 90.0°F (1998) | 28.9°F (2014) | 0.96 in (1978) |
| September 13 | 84.0°F (2005) | 30.9°F (2014) | 1.75 in (1980) |
| September 14 | 82.0°F (2005) | 32.0°F (2001) | 1.44 in (2021) |
| September 15 | 84.9°F (2018) | 32.0°F (2014) | 2.23 in (1994) |
| September 16 | 84.0°F (2006) | 28.9°F (2011) | 2.82 in (2010) |
| September 17 | 82.9°F (2024) | 28.9°F (1945) | 0.68 in (1997) |
| September 18 | 82.0°F (2025) | 27.0°F (2020) | 1.14 in (2025) |
| September 19 | 84.9°F (1940) | 28.0°F (2020) | 0.88 in (1977) |
| September 20 | 82.9°F (1940) | 30.0°F (2012) | 4.15 in (1983) |
| September 21 | 82.0°F (2023) | 26.1°F (1999) | 2.30 in (1980) |
| September 22 | 82.0°F (2005) | 26.1°F (1947) | 0.84 in (2016) |
| September 23 | 86.0°F (2017) | 27.0°F (1944) | 0.75 in (2017) |
| September 24 | 86.0°F (2017) | 27.0°F (1943) | 2.27 in (2010) |
| September 25 | 82.9°F (2017) | 19.9°F (1947) | 1.12 in (2019) |
| September 26 | 79.0°F (2024) | 28.0°F (1947) | 2.53 in (1972) |
| September 27 | 80.1°F (2024) | 26.1°F (1991) | 1.67 in (2020) |
| September 28 | 82.9°F (2024) | 30.0°F (2012) | 0.73 in (1965) |
| September 29 | 78.1°F (2021) | 24.1°F (2003) | 0.75 in (1978) |
| September 30 | 81.0°F (2025) | 19.9°F (1947) | 1.18 in (1985) |