September weather in Ashland, WI
The average temperature in Ashland in September is 58.0°F (47.3°F–68.7°F). Average precipitation: 3.58 inches.
September is a fall month in Ashland, and is warmer than the annual average of 41.3°F. Daily temperatures swing about 21.4°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
68.7°F
Avg Low
47.3°F
Precipitation
3.58 in
Daylight
12h 19m
September records in Ashland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 86.0°F (2008) | 39.0°F (2017) | 0.46 in (2000) |
| September 2 | 91.9°F (2001) | 43.0°F (2016) | 0.38 in (2000) |
| September 3 | 89.1°F (2001) | 42.1°F (2005) | 0.61 in (2019) |
| September 4 | 93.0°F (2023) | 36.0°F (2022) | 0.75 in (1999) |
| September 5 | 95.0°F (2023) | 39.0°F (2011) | 1.25 in (1999) |
| September 6 | 91.0°F (1998) | 39.0°F (2025) | 1.88 in (2023) |
| September 7 | 88.0°F (2001) | 37.9°F (2024) | 1.50 in (2001) |
| September 8 | 91.0°F (2002) | 35.1°F (2017) | 1.50 in (1999) |
| September 9 | 91.0°F (2002) | 33.1°F (2020) | 1.79 in (2025) |
| September 10 | 89.1°F (2002) | 34.0°F (2020) | 2.00 in (2014) |
| September 11 | 90.0°F (2005) | 36.0°F (2006) | 0.55 in (2010) |
| September 12 | 89.1°F (1998) | 36.0°F (2014) | 0.72 in (2008) |
| September 13 | 86.0°F (2011) | 37.9°F (2006) | 1.50 in (2005) |
| September 14 | 84.0°F (2004) | 33.1°F (2012) | 1.02 in (2008) |
| September 15 | 87.1°F (2017) | 28.0°F (2007) | 1.20 in (2004) |
| September 16 | 86.0°F (2024) | 27.0°F (2011) | 1.30 in (2010) |
| September 17 | 87.1°F (2024) | 30.0°F (2011) | 0.75 in (2021) |
| September 18 | 84.9°F (2024) | 28.0°F (2020) | 0.77 in (2022) |
| September 19 | 86.0°F (1998) | 32.0°F (2020) | 2.51 in (2003) |
| September 20 | 86.0°F (2021) | 36.0°F (2006) | 0.83 in (2005) |
| September 21 | 82.0°F (2009) | 30.0°F (1999) | 1.12 in (2018) |
| September 22 | 84.0°F (2023) | 30.9°F (1999) | 0.65 in (2001) |
| September 23 | 84.9°F (2017) | 33.1°F (2002) | 0.80 in (2002) |
| September 24 | 90.0°F (2017) | 27.0°F (2001) | 2.20 in (2010) |
| September 25 | 89.1°F (2017) | 28.0°F (2001) | 0.67 in (2007) |
| September 26 | 79.0°F (2025) | 28.9°F (2010) | 1.67 in (2017) |
| September 27 | 81.0°F (2008) | 28.9°F (2012) | 0.52 in (2008) |
| September 28 | 84.0°F (2024) | 28.0°F (2022) | 0.36 in (2004) |
| September 29 | 82.0°F (2014) | 28.9°F (2003) | 0.38 in (2014) |
| September 30 | 84.9°F (2025) | 28.0°F (2015) | 1.35 in (2019) |