September weather in Niagara, WI
The average temperature in Niagara in September is 58.6°F (47.0°F–70.1°F). Average precipitation: 3.60 inches.
September is a fall month in Niagara, and is warmer than the annual average of 42.5°F. Daily temperatures swing about 23.1°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
70.1°F
Avg Low
47.0°F
Precipitation
3.60 in
Daylight
12h 18m
September records in Niagara
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (1953) | 30.9°F (1935) | 3.15 in (1923) |
| September 2 | 91.9°F (1929) | 28.0°F (1976) | 1.54 in (1904) |
| September 3 | 95.0°F (1929) | 25.0°F (1946) | 1.80 in (2015) |
| September 4 | 91.9°F (2023) | 32.0°F (1918) | 1.61 in (1934) |
| September 5 | 90.0°F (1933) | 27.0°F (1904) | 3.15 in (2018) |
| September 6 | 91.0°F (1998) | 34.0°F (1903) | 1.53 in (1922) |
| September 7 | 96.1°F (1976) | 30.0°F (1986) | 1.96 in (1903) |
| September 8 | 95.0°F (1931) | 28.9°F (1944) | 1.73 in (1922) |
| September 9 | 95.0°F (1931) | 28.9°F (1956) | 1.73 in (1980) |
| September 10 | 96.1°F (1931) | 28.0°F (1935) | 1.49 in (1974) |
| September 11 | 97.0°F (1931) | 24.1°F (1943) | 1.88 in (2000) |
| September 12 | 98.1°F (1998) | 23.0°F (1946) | 1.55 in (1951) |
| September 13 | 89.1°F (1939) | 26.1°F (1943) | 1.48 in (2019) |
| September 14 | 93.0°F (1939) | 27.0°F (1899) | 1.53 in (1993) |
| September 15 | 93.0°F (1939) | 26.1°F (1964) | 1.79 in (1957) |
| September 16 | 90.0°F (1955) | 24.1°F (1945) | 2.45 in (1941) |
| September 17 | 88.0°F (1925) | 23.0°F (1903) | 1.74 in (2016) |
| September 18 | 90.0°F (1908) | 27.0°F (1932) | 1.00 in (1918) |
| September 19 | 89.1°F (1908) | 28.9°F (1979) | 1.23 in (1965) |
| September 20 | 90.0°F (1914) | 23.0°F (1956) | 2.62 in (1931) |
| September 21 | 88.0°F (1908) | 21.9°F (1956) | 1.91 in (2007) |
| September 22 | 90.0°F (1908) | 26.1°F (1974) | 1.25 in (1996) |
| September 23 | 87.1°F (1911) | 21.9°F (1974) | 1.53 in (1945) |
| September 24 | 89.1°F (2017) | 21.9°F (1989) | 2.76 in (2010) |
| September 25 | 88.0°F (2017) | 19.9°F (1947) | 0.60 in (2021) |
| September 26 | 87.1°F (2017) | 23.0°F (1939) | 2.30 in (1972) |
| September 27 | 84.0°F (1923) | 21.9°F (1957) | 1.56 in (1944) |
| September 28 | 88.0°F (1905) | 19.0°F (1942) | 0.87 in (1971) |
| September 29 | 88.0°F (1983) | 19.0°F (2004) | 1.26 in (1901) |
| September 30 | 82.0°F (1905) | 23.0°F (1939) | 1.54 in (1985) |