September weather in Superior, MT
The average temperature in Superior in September is 59.5°F (41.9°F–77.2°F). Average precipitation: 0.99 inches.
September is a fall month in Superior, and is warmer than the annual average of 47.7°F. Daily temperatures swing about 35.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
77.2°F
Avg Low
41.9°F
Precipitation
0.99 in
Daylight
12h 19m
September records in Superior
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1998) | 30.0°F (1924) | 0.44 in (2007) |
| September 2 | 98.1°F (1998) | 3.0°F (1956) | 0.60 in (1915) |
| September 3 | 102.9°F (1950) | 25.0°F (1918) | 0.69 in (1997) |
| September 4 | 100.0°F (1998) | 30.0°F (1948) | 0.56 in (1994) |
| September 5 | 100.0°F (1998) | 30.0°F (1914) | 0.75 in (2015) |
| September 6 | 100.0°F (1998) | 24.1°F (1929) | 0.71 in (1985) |
| September 7 | 96.1°F (1958) | 21.9°F (1929) | 0.50 in (1926) |
| September 8 | 95.0°F (1958) | 23.0°F (1997) | 0.70 in (1931) |
| September 9 | 97.0°F (1935) | 23.0°F (1997) | 0.80 in (1931) |
| September 10 | 100.0°F (1935) | 28.0°F (1916) | 0.37 in (2005) |
| September 11 | 95.0°F (1935) | 28.9°F (1921) | 0.99 in (1930) |
| September 12 | 95.0°F (1989) | 24.1°F (1945) | 1.01 in (1985) |
| September 13 | 93.0°F (2011) | 25.0°F (1945) | 0.70 in (1931) |
| September 14 | 91.9°F (1948) | 21.9°F (1921) | 0.69 in (1996) |
| September 15 | 95.0°F (1998) | 24.1°F (1970) | 0.91 in (1965) |
| September 16 | 95.0°F (1998) | 23.0°F (1921) | 1.17 in (1947) |
| September 17 | 93.9°F (2009) | 24.1°F (1965) | 0.41 in (2007) |
| September 18 | 97.0°F (1981) | 25.0°F (1921) | 1.05 in (1986) |
| September 19 | 90.0°F (1918) | 19.9°F (1943) | 0.68 in (1995) |
| September 20 | 91.9°F (1917) | 24.1°F (1928) | 0.50 in (1986) |
| September 21 | 93.0°F (1938) | 24.1°F (1932) | 0.88 in (1945) |
| September 22 | 93.9°F (1938) | 21.0°F (1932) | 1.00 in (1926) |
| September 23 | 93.0°F (1938) | 24.1°F (2000) | 1.11 in (1917) |
| September 24 | 95.0°F (1967) | 12.9°F (1926) | 0.73 in (1917) |
| September 25 | 95.0°F (2001) | 17.1°F (1926) | 0.53 in (1951) |
| September 26 | 91.0°F (1952) | 21.9°F (1926) | 0.49 in (1915) |
| September 27 | 93.9°F (1963) | 21.9°F (1926) | 0.45 in (1919) |
| September 28 | 91.9°F (1967) | 23.0°F (1961) | 0.65 in (1982) |
| September 29 | 91.9°F (1963) | 19.9°F (1985) | 0.46 in (1977) |
| September 30 | 90.0°F (1935) | 23.0°F (1929) | 0.40 in (1956) |