September weather in Spencer, WI
The average temperature in Spencer in September is 59.3°F (48.7°F–70.0°F). Average precipitation: 3.03 inches.
September is a fall month in Spencer, and is warmer than the annual average of 43.7°F. Daily temperatures swing about 21.3°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
70.0°F
Avg Low
48.7°F
Precipitation
3.03 in
Daylight
12h 18m
September records in Spencer
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (2011) | 42.1°F (2001) | 1.54 in (2002) |
| September 2 | 91.9°F (2023) | 45.0°F (1998) | 0.48 in (2010) |
| September 3 | 98.1°F (2023) | 39.9°F (2025) | 1.24 in (2019) |
| September 4 | 93.9°F (2023) | 37.9°F (2025) | 1.69 in (2018) |
| September 5 | 90.0°F (2023) | 42.1°F (2010) | 0.88 in (2018) |
| September 6 | 90.0°F (2015) | 41.0°F (2025) | 3.35 in (2015) |
| September 7 | 91.9°F (2013) | 37.9°F (2024) | 1.60 in (2015) |
| September 8 | 89.1°F (2003) | 39.9°F (2025) | 0.43 in (2001) |
| September 9 | 89.1°F (2013) | 37.9°F (2008) | 1.01 in (2019) |
| September 10 | 89.1°F (2013) | 36.0°F (2020) | 0.41 in (2014) |
| September 11 | 89.1°F (2005) | 37.0°F (2020) | 2.24 in (2000) |
| September 12 | 86.0°F (2005) | 34.0°F (2007) | 1.42 in (2019) |
| September 13 | 88.0°F (1998) | 33.1°F (2014) | 2.00 in (2005) |
| September 14 | 84.0°F (2017) | 32.0°F (2007) | 0.86 in (2004) |
| September 15 | 87.1°F (2018) | 27.1°F (2007) | 0.76 in (2004) |
| September 16 | 84.0°F (2024) | 36.0°F (2000) | 0.16 in (2006) |
| September 17 | 86.0°F (2018) | 37.0°F (2011) | 0.18 in (2013) |
| September 18 | 82.9°F (2000) | 34.0°F (2012) | 0.40 in (2011) |
| September 19 | 84.9°F (2021) | 35.1°F (2020) | 1.42 in (2013) |
| September 20 | 82.0°F (2023) | 34.0°F (1999) | 2.19 in (2002) |
| September 21 | 86.0°F (2005) | 30.0°F (1999) | 2.31 in (2016) |
| September 22 | 90.0°F (2017) | 35.1°F (2012) | 1.30 in (2010) |
| September 23 | 89.1°F (2017) | 30.2°F (2012) | 2.63 in (2010) |
| September 24 | 88.0°F (2017) | 33.1°F (2000) | 0.77 in (2007) |
| September 25 | 86.0°F (2017) | 30.0°F (2001) | 1.00 in (2005) |
| September 26 | 81.0°F (1998) | 34.0°F (2012) | 0.46 in (2011) |
| September 27 | 81.0°F (2013) | 35.1°F (2012) | 0.21 in (1999) |
| September 28 | 82.0°F (2024) | 30.2°F (2022) | 0.33 in (2013) |
| September 29 | 82.9°F (2025) | 27.1°F (2018) | 0.54 in (2002) |
| September 30 | 82.0°F (2019) | 30.0°F (2003) | 1.20 in (2023) |