September weather in International Falls, MN
The average temperature in International Falls in September is 54.2°F (42.0°F–66.4°F). Average precipitation: 3.00 inches.
September is a fall month in International Falls, and is warmer than the annual average of 37.4°F. Daily temperatures swing about 24.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
66.4°F
Avg Low
42.0°F
Precipitation
3.00 in
Snow
0.1 in
September records in International Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1913) | 32.0°F (1909) | 3.34 in (1973) |
| September 2 | 91.9°F (1971) | 32.0°F (1908) | 2.40 in (1953) |
| September 3 | 88.0°F (1960) | 28.0°F (1997) | 2.17 in (1916) |
| September 4 | 91.0°F (1922) | 30.9°F (1917) | 1.67 in (1926) |
| September 5 | 91.9°F (1912) | 28.9°F (1962) | 2.56 in (1948) |
| September 6 | 93.0°F (1913) | 28.2°F (2018) | 1.15 in (1995) |
| September 7 | 96.1°F (1906) | 28.9°F (2025) | 1.54 in (2001) |
| September 8 | 91.9°F (1906) | 28.9°F (1956) | 2.45 in (1962) |
| September 9 | 93.0°F (1906) | 25.0°F (2006) | 1.25 in (1925) |
| September 10 | 93.0°F (1906) | 25.0°F (1917) | 1.56 in (1961) |
| September 11 | 86.0°F (1976) | 28.9°F (1955) | 1.65 in (2008) |
| September 12 | 87.1°F (1952) | 26.1°F (1910) | 1.48 in (2019) |
| September 13 | 89.1°F (1952) | 25.2°F (2014) | 1.39 in (1909) |
| September 14 | 88.0°F (1920) | 27.0°F (2011) | 1.36 in (1965) |
| September 15 | 84.0°F (1920) | 19.0°F (2011) | 1.50 in (2004) |
| September 16 | 87.1°F (2018) | 23.0°F (2011) | 2.27 in (2024) |
| September 17 | 84.0°F (1920) | 23.2°F (2020) | 1.58 in (1955) |
| September 18 | 84.0°F (2024) | 19.9°F (2012) | 1.82 in (1957) |
| September 19 | 86.0°F (1914) | 27.0°F (1992) | 1.25 in (1988) |
| September 20 | 84.9°F (1914) | 19.9°F (1956) | 2.02 in (2021) |
| September 21 | 82.9°F (1920) | 26.1°F (1956) | 1.29 in (1973) |
| September 22 | 86.0°F (1920) | 24.1°F (1971) | 1.30 in (1924) |
| September 23 | 86.0°F (1958) | 21.0°F (2012) | 0.83 in (2010) |
| September 24 | 82.0°F (1917) | 25.0°F (2001) | 1.82 in (2010) |
| September 25 | 84.9°F (1920) | 23.0°F (1951) | 1.34 in (1915) |
| September 26 | 82.9°F (1922) | 19.9°F (1965) | 1.97 in (1981) |
| September 27 | 91.0°F (1952) | 23.0°F (1907) | 0.91 in (1996) |
| September 28 | 84.0°F (2021) | 24.1°F (1907) | 1.83 in (1997) |
| September 29 | 84.9°F (2021) | 23.0°F (1907) | 1.54 in (1995) |
| September 30 | 82.0°F (1922) | 24.1°F (1906) | 2.37 in (1971) |