September weather in Birchwood, WI
The average temperature in Birchwood in September is 57.2°F (45.5°F–69.0°F). Average precipitation: 4.29 inches.
September is a fall month in Birchwood, and is warmer than the annual average of 41.4°F. Daily temperatures swing about 23.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
69.0°F
Avg Low
45.5°F
Precipitation
4.29 in
Daylight
12h 18m
September records in Birchwood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1953) | 30.0°F (1992) | 1.41 in (2014) |
| September 2 | 91.0°F (1983) | 32.0°F (1965) | 1.55 in (2015) |
| September 3 | 90.0°F (2023) | 30.0°F (1993) | 1.76 in (2019) |
| September 4 | 91.0°F (2023) | 24.1°F (1993) | 3.52 in (2014) |
| September 5 | 91.0°F (2023) | 28.0°F (1993) | 2.10 in (2004) |
| September 6 | 90.0°F (1960) | 24.1°F (1993) | 2.42 in (2016) |
| September 7 | 95.0°F (1976) | 24.1°F (1956) | 0.86 in (1959) |
| September 8 | 89.1°F (1959) | 25.0°F (1995) | 3.00 in (1985) |
| September 9 | 90.0°F (1961) | 27.0°F (1956) | 2.20 in (1974) |
| September 10 | 90.0°F (1978) | 24.1°F (1976) | 1.29 in (1951) |
| September 11 | 91.0°F (1978) | 24.1°F (1955) | 1.01 in (1963) |
| September 12 | 88.0°F (2005) | 25.0°F (1985) | 2.86 in (1990) |
| September 13 | 86.0°F (1998) | 19.9°F (1963) | 1.60 in (1984) |
| September 14 | 86.0°F (1998) | 28.0°F (1984) | 2.35 in (1991) |
| September 15 | 84.9°F (1991) | 19.0°F (2007) | 2.25 in (1994) |
| September 16 | 84.0°F (1991) | 28.9°F (1976) | 1.18 in (1955) |
| September 17 | 84.0°F (1998) | 21.0°F (1959) | 1.90 in (1997) |
| September 18 | 84.0°F (1985) | 24.1°F (1991) | 2.50 in (2007) |
| September 19 | 87.1°F (1998) | 27.0°F (1979) | 1.05 in (2003) |
| September 20 | 84.0°F (1989) | 18.0°F (1956) | 2.85 in (1988) |
| September 21 | 81.0°F (2005) | 21.0°F (1997) | 3.92 in (2018) |
| September 22 | 82.9°F (2017) | 24.1°F (1982) | 0.75 in (1977) |
| September 23 | 84.0°F (2017) | 18.0°F (1983) | 3.80 in (1968) |
| September 24 | 82.9°F (2017) | 16.0°F (1976) | 1.73 in (2023) |
| September 25 | 81.0°F (2017) | 17.1°F (1992) | 1.33 in (2019) |
| September 26 | 80.1°F (1986) | 17.1°F (1991) | 0.95 in (1973) |
| September 27 | 79.0°F (2024) | 17.1°F (1991) | 0.80 in (1996) |
| September 28 | 81.0°F (1952) | 19.9°F (1984) | 1.10 in (1971) |
| September 29 | 82.9°F (2025) | 17.1°F (2003) | 0.65 in (1986) |
| September 30 | 82.0°F (1989) | 18.0°F (1956) | 2.35 in (2019) |