September weather in Big Falls, MN
The average temperature in Big Falls in September is 54.5°F (43.6°F–65.4°F). Average precipitation: 3.16 inches.
September is a fall month in Big Falls, and is warmer than the annual average of 37.5°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
65.4°F
Avg Low
43.6°F
Precipitation
3.16 in
Daylight
12h 20m
September records in Big Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (1983) | 28.9°F (1935) | 2.21 in (1973) |
| September 2 | 93.9°F (1983) | 26.1°F (1946) | 2.53 in (1999) |
| September 3 | 91.9°F (1983) | 28.0°F (1974) | 2.00 in (1939) |
| September 4 | 91.9°F (1978) | 32.0°F (1981) | 1.85 in (1941) |
| September 5 | 93.0°F (1978) | 32.0°F (2010) | 1.15 in (1983) |
| September 6 | 95.0°F (1976) | 27.0°F (1930) | 1.38 in (2000) |
| September 7 | 97.0°F (1976) | 28.0°F (1956) | 1.11 in (2010) |
| September 8 | 98.1°F (1931) | 25.0°F (1956) | 2.75 in (2015) |
| September 9 | 96.1°F (1931) | 28.9°F (1967) | 1.35 in (1962) |
| September 10 | 97.0°F (1931) | 30.0°F (1955) | 1.75 in (1947) |
| September 11 | 95.0°F (1931) | 27.0°F (1955) | 2.25 in (2008) |
| September 12 | 84.9°F (1952) | 28.0°F (1955) | 1.19 in (2019) |
| September 13 | 89.1°F (1952) | 21.9°F (1975) | 1.10 in (1931) |
| September 14 | 82.9°F (1952) | 30.0°F (1964) | 1.05 in (1939) |
| September 15 | 84.0°F (1968) | 23.0°F (1964) | 0.74 in (1983) |
| September 16 | 84.9°F (1948) | 27.0°F (1932) | 1.09 in (1997) |
| September 17 | 84.9°F (1998) | 23.0°F (1959) | 1.77 in (2024) |
| September 18 | 84.9°F (1976) | 26.1°F (2012) | 2.35 in (1955) |
| September 19 | 87.1°F (1984) | 27.0°F (1956) | 2.39 in (1988) |
| September 20 | 84.9°F (1941) | 19.9°F (1956) | 0.65 in (2004) |
| September 21 | 91.9°F (1936) | 26.1°F (1933) | 1.12 in (1970) |
| September 22 | 87.1°F (1938) | 10.0°F (1934) | 1.40 in (1946) |
| September 23 | 87.1°F (1930) | 24.1°F (1936) | 0.66 in (1964) |
| September 24 | 81.0°F (1990) | 26.1°F (1951) | 2.44 in (2010) |
| September 25 | 82.9°F (1950) | 19.9°F (1976) | 0.73 in (1931) |
| September 26 | 81.0°F (1963) | 15.1°F (1965) | 0.90 in (1981) |
| September 27 | 80.1°F (1952) | 19.9°F (1942) | 1.50 in (1946) |
| September 28 | 84.0°F (2021) | 19.0°F (1945) | 0.82 in (1982) |
| September 29 | 82.9°F (2021) | 21.0°F (1935) | 1.21 in (1995) |
| September 30 | 84.9°F (1976) | 10.0°F (1930) | 1.81 in (1995) |