September weather in Casco, WI
The average temperature in Casco in September is 60.1°F (52.1°F–68.1°F). Average precipitation: 3.10 inches.
September is a fall month in Casco, and is warmer than the annual average of 44.4°F. Daily temperatures swing about 16°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
68.1°F
Avg Low
52.1°F
Precipitation
3.10 in
Daylight
12h 17m
September records in Casco
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (1953) | 42.1°F (1909) | 1.31 in (1914) |
| September 2 | 96.1°F (1937) | 39.9°F (1976) | 0.93 in (1963) |
| September 3 | 95.0°F (1937) | 41.0°F (1972) | 1.15 in (2019) |
| September 4 | 91.9°F (2023) | 41.0°F (1974) | 2.65 in (2018) |
| September 5 | 89.1°F (1931) | 42.1°F (1976) | 3.78 in (1985) |
| September 6 | 91.9°F (1919) | 39.0°F (1988) | 1.46 in (1990) |
| September 7 | 93.9°F (1913) | 36.0°F (1986) | 1.10 in (1990) |
| September 8 | 93.0°F (1919) | 42.1°F (1917) | 0.89 in (2001) |
| September 9 | 93.9°F (1931) | 41.0°F (1914) | 1.65 in (2015) |
| September 10 | 98.1°F (1931) | 39.0°F (1917) | 3.21 in (1986) |
| September 11 | 96.1°F (1931) | 36.0°F (1943) | 1.65 in (1986) |
| September 12 | 88.0°F (1998) | 39.0°F (1964) | 2.15 in (1978) |
| September 13 | 87.1°F (2011) | 33.1°F (2013) | 2.14 in (1961) |
| September 14 | 97.0°F (1939) | 37.0°F (2013) | 2.50 in (1992) |
| September 15 | 93.9°F (1939) | 37.9°F (2007) | 1.15 in (1914) |
| September 16 | 84.0°F (1994) | 33.1°F (1916) | 0.98 in (1992) |
| September 17 | 90.0°F (1948) | 33.1°F (1916) | 1.82 in (1987) |
| September 18 | 89.1°F (2018) | 35.1°F (1916) | 2.90 in (1938) |
| September 19 | 89.1°F (1932) | 35.1°F (1918) | 1.61 in (1919) |
| September 20 | 88.0°F (1940) | 32.0°F (1956) | 0.85 in (1913) |
| September 21 | 82.9°F (1970) | 35.1°F (1918) | 1.20 in (2014) |
| September 22 | 86.0°F (1936) | 30.0°F (1976) | 2.30 in (1988) |
| September 23 | 87.1°F (1936) | 28.9°F (1974) | 1.20 in (2010) |
| September 24 | 86.0°F (2017) | 28.0°F (1989) | 1.65 in (1970) |
| September 25 | 84.9°F (1935) | 30.9°F (1942) | 0.73 in (1941) |
| September 26 | 82.0°F (1963) | 25.0°F (1926) | 2.72 in (1998) |
| September 27 | 82.9°F (1986) | 30.9°F (1991) | 2.42 in (1944) |
| September 28 | 82.9°F (2025) | 28.9°F (1942) | 1.50 in (1911) |
| September 29 | 80.1°F (1914) | 30.0°F (1984) | 0.95 in (1950) |
| September 30 | 79.0°F (1957) | 30.0°F (1939) | 1.78 in (1961) |