September weather in Birnamwood, WI
The average temperature in Birnamwood in September is 58.0°F (47.0°F–69.0°F). Average precipitation: inches.
September is a fall month in Birnamwood, and is warmer than the annual average of 42.3°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
69.0°F
Avg Low
47.0°F
Precipitation
in
Daylight
12h 18m
September records in Birnamwood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.0°F (2012) | 41.0°F (2017) | 1.15 in (2010) |
| September 2 | 86.0°F (2015) | 42.1°F (2009) | 0.65 in (2020) |
| September 3 | 93.9°F (2023) | 43.0°F (2009) | 2.04 in (2019) |
| September 4 | 93.9°F (2023) | 36.0°F (2025) | 0.65 in (2014) |
| September 5 | 91.9°F (2023) | 39.9°F (2010) | 4.24 in (2014) |
| September 6 | 86.0°F (2007) | 37.0°F (2011) | 0.58 in (2019) |
| September 7 | 88.0°F (2015) | 37.9°F (2025) | 0.69 in (2007) |
| September 8 | 86.0°F (2013) | 37.0°F (2017) | 0.20 in (2005) |
| September 9 | 82.0°F (2022) | 37.9°F (2008) | 0.63 in (2015) |
| September 10 | 81.0°F (2013) | 33.1°F (2008) | 1.09 in (2019) |
| September 11 | 86.0°F (2005) | 32.0°F (2020) | 0.26 in (2014) |
| September 12 | 88.0°F (2005) | 35.1°F (2014) | 1.27 in (2019) |
| September 13 | 86.0°F (2005) | 36.0°F (2014) | 0.77 in (2019) |
| September 14 | 82.0°F (2005) | 35.1°F (2013) | 0.43 in (2005) |
| September 15 | 82.9°F (2018) | 28.9°F (2007) | 0.20 in (2004) |
| September 16 | 84.9°F (2018) | 33.1°F (2007) | 1.46 in (2010) |
| September 17 | 82.9°F (2024) | 30.0°F (2013) | 0.00 in (2004) |
| September 18 | 84.9°F (2018) | 30.9°F (2020) | 0.89 in (2015) |
| September 19 | 80.1°F (2007) | 28.9°F (2012) | 1.90 in (2019) |
| September 20 | 82.0°F (2021) | 32.0°F (2006) | 0.53 in (2024) |
| September 21 | 78.1°F (2005) | 36.0°F (2006) | 0.62 in (2018) |
| September 22 | 86.0°F (2005) | 30.9°F (2013) | 1.43 in (2016) |
| September 23 | 87.1°F (2017) | 30.9°F (2012) | 2.38 in (2010) |
| September 24 | 88.0°F (2017) | 30.0°F (2012) | 1.29 in (2010) |
| September 25 | 87.1°F (2017) | 36.0°F (2006) | 0.53 in (2007) |
| September 26 | 86.0°F (2017) | 34.0°F (2012) | 0.37 in (2018) |
| September 27 | 79.0°F (2008) | 30.0°F (2012) | 0.98 in (2011) |
| September 28 | 78.1°F (2024) | 32.0°F (2012) | 0.38 in (2009) |
| September 29 | 79.0°F (2014) | 28.0°F (2018) | 0.90 in (2005) |
| September 30 | 78.1°F (2025) | 30.0°F (2004) | 0.30 in (2014) |