September weather in Winona, MN
The average temperature in Winona in September is 65.0°F (55.0°F–74.9°F). Average precipitation: inches.
September is a fall month in Winona, and is warmer than the annual average of 48.8°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
74.9°F
Avg Low
55.0°F
Precipitation
in
Daylight
12h 17m
September records in Winona
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1913) | 37.9°F (1909) | 2.30 in (1997) |
| September 2 | 98.1°F (1925) | 41.0°F (1974) | 1.54 in (1906) |
| September 3 | 98.1°F (1953) | 34.0°F (1974) | 1.66 in (1934) |
| September 4 | 98.1°F (1925) | 34.0°F (1974) | 2.26 in (1968) |
| September 5 | 98.1°F (1922) | 37.0°F (1918) | 2.11 in (1910) |
| September 6 | 102.0°F (1922) | 37.9°F (1918) | 2.51 in (1938) |
| September 7 | 100.0°F (1939) | 37.0°F (1986) | 1.86 in (2001) |
| September 8 | 100.0°F (1978) | 37.9°F (1956) | 1.86 in (1964) |
| September 9 | 98.1°F (1978) | 37.9°F (1924) | 1.46 in (1992) |
| September 10 | 100.0°F (1931) | 30.9°F (1917) | 2.67 in (1986) |
| September 11 | 96.1°F (1978) | 32.0°F (1917) | 1.91 in (1933) |
| September 12 | 96.1°F (1931) | 33.1°F (1975) | 2.13 in (1984) |
| September 13 | 99.0°F (1927) | 28.9°F (1975) | 1.76 in (1972) |
| September 14 | 98.1°F (1927) | 28.9°F (1923) | 2.60 in (1992) |
| September 15 | 98.1°F (1939) | 34.0°F (2007) | 2.93 in (2004) |
| September 16 | 93.0°F (1939) | 32.0°F (1916) | 3.70 in (1992) |
| September 17 | 93.0°F (1908) | 32.0°F (1916) | 1.24 in (1907) |
| September 18 | 93.9°F (1955) | 30.9°F (1916) | 2.80 in (1907) |
| September 19 | 93.0°F (1908) | 30.9°F (1973) | 2.73 in (1965) |
| September 20 | 93.9°F (1908) | 30.9°F (1991) | 2.15 in (1895) |
| September 21 | 91.0°F (1908) | 28.0°F (1918) | 2.94 in (1986) |
| September 22 | 91.9°F (1937) | 27.0°F (1974) | 1.10 in (1994) |
| September 23 | 91.9°F (1937) | 27.0°F (1974) | 0.71 in (1926) |
| September 24 | 89.1°F (1935) | 30.0°F (1976) | 0.95 in (1910) |
| September 25 | 91.0°F (1920) | 28.0°F (1942) | 2.00 in (2005) |
| September 26 | 89.1°F (1986) | 28.9°F (1926) | 2.28 in (1934) |
| September 27 | 87.1°F (1943) | 26.1°F (1942) | 1.36 in (1924) |
| September 28 | 86.0°F (1894) | 25.0°F (1942) | 1.52 in (1965) |
| September 29 | 88.0°F (1922) | 27.0°F (1984) | 1.04 in (1972) |
| September 30 | 86.0°F (1953) | 28.0°F (1972) | 2.10 in (1925) |