September weather in Mellen, WI
The average temperature in Mellen in September is 57.0°F (46.4°F–67.6°F). Average precipitation: 3.62 inches. Average snowfall is 0.2 inches.
September is a fall month in Mellen, and is warmer than the annual average of 40.4°F. Daily temperatures swing about 21.2°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
67.6°F
Avg Low
46.4°F
Precipitation
3.62 in
Snow
0.2 in
September records in Mellen
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (1942) | 28.0°F (1935) | 1.31 in (2014) |
| September 2 | 89.1°F (1942) | 28.0°F (1946) | 1.06 in (1970) |
| September 3 | 90.0°F (1983) | 25.0°F (1946) | 1.60 in (1985) |
| September 4 | 90.0°F (1948) | 33.1°F (1950) | 1.56 in (1941) |
| September 5 | 91.9°F (1933) | 32.0°F (1957) | 2.43 in (1983) |
| September 6 | 90.0°F (1960) | 30.9°F (1988) | 1.52 in (1946) |
| September 7 | 90.0°F (1945) | 28.9°F (1986) | 1.51 in (1990) |
| September 8 | 98.1°F (1976) | 28.9°F (1956) | 1.10 in (1938) |
| September 9 | 91.9°F (1931) | 30.9°F (1969) | 1.38 in (1936) |
| September 10 | 93.9°F (1931) | 30.9°F (1967) | 2.06 in (2014) |
| September 11 | 91.9°F (1931) | 30.0°F (1955) | 1.70 in (1942) |
| September 12 | 90.0°F (1931) | 27.0°F (1946) | 3.42 in (1951) |
| September 13 | 90.0°F (1936) | 27.0°F (1963) | 1.67 in (1994) |
| September 14 | 91.9°F (1939) | 30.0°F (1970) | 1.57 in (2008) |
| September 15 | 93.0°F (1939) | 25.0°F (1964) | 2.98 in (1941) |
| September 16 | 93.9°F (1927) | 25.0°F (1945) | 1.52 in (2010) |
| September 17 | 90.0°F (1927) | 23.0°F (1959) | 0.95 in (1955) |
| September 18 | 88.0°F (1955) | 25.0°F (1929) | 1.32 in (1987) |
| September 19 | 87.1°F (1940) | 24.1°F (1929) | 2.57 in (2007) |
| September 20 | 88.0°F (1941) | 25.0°F (1929) | 1.30 in (1931) |
| September 21 | 90.0°F (1941) | 25.0°F (1948) | 1.42 in (1972) |
| September 22 | 90.0°F (1936) | 23.0°F (1947) | 1.06 in (1986) |
| September 23 | 91.0°F (1937) | 26.1°F (1948) | 1.46 in (1968) |
| September 24 | 87.1°F (1935) | 25.0°F (1950) | 2.31 in (2010) |
| September 25 | 82.9°F (2007) | 17.1°F (1947) | 1.74 in (1934) |
| September 26 | 81.0°F (1938) | 21.9°F (1947) | 2.13 in (1930) |
| September 27 | 82.0°F (1927) | 23.0°F (1935) | 1.40 in (1944) |
| September 28 | 86.0°F (1987) | 21.9°F (2001) | 1.04 in (2009) |
| September 29 | 80.1°F (1983) | 15.1°F (1945) | 0.50 in (1939) |
| September 30 | 80.1°F (1952) | 17.1°F (1947) | 1.35 in (1985) |