September weather in Chanhassen, MN
The average temperature in Chanhassen in September is 61.3°F (51.1°F–71.4°F). Average precipitation: 3.29 inches.
September is a fall month in Chanhassen, and is warmer than the annual average of 44.6°F. Daily temperatures swing about 20.3°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
71.4°F
Avg Low
51.1°F
Precipitation
3.29 in
Daylight
12h 18m
September records in Chanhassen
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2011) | 48.0°F (2009) | 0.67 in (2025) |
| September 2 | 87.1°F (1999) | 46.9°F (1998) | 0.90 in (1997) |
| September 3 | 96.1°F (2023) | 45.0°F (2013) | 2.13 in (2006) |
| September 4 | 96.1°F (2023) | 43.0°F (2025) | 5.53 in (2005) |
| September 5 | 90.0°F (1998) | 43.0°F (2025) | 0.80 in (2004) |
| September 6 | 90.0°F (2003) | 44.1°F (2025) | 3.44 in (2002) |
| September 7 | 91.9°F (2003) | 41.0°F (2025) | 1.77 in (2007) |
| September 8 | 89.1°F (2002) | 45.0°F (2008) | 0.65 in (2001) |
| September 9 | 91.0°F (2013) | 36.0°F (2020) | 0.85 in (1997) |
| September 10 | 88.0°F (1998) | 34.0°F (2020) | 0.35 in (2001) |
| September 11 | 95.0°F (2012) | 37.9°F (2020) | 1.46 in (2019) |
| September 12 | 87.1°F (1998) | 37.9°F (2007) | 2.03 in (2019) |
| September 13 | 91.9°F (1998) | 32.0°F (2014) | 1.14 in (2005) |
| September 14 | 86.0°F (2017) | 37.0°F (1996) | 0.47 in (2004) |
| September 15 | 91.0°F (2018) | 32.0°F (2007) | 1.13 in (2004) |
| September 16 | 90.0°F (2025) | 37.0°F (2014) | 0.91 in (2010) |
| September 17 | 86.0°F (2007) | 42.1°F (2020) | 2.04 in (1997) |
| September 18 | 89.1°F (2000) | 36.0°F (2020) | 0.42 in (2017) |
| September 19 | 91.0°F (1998) | 42.1°F (2003) | 1.06 in (2007) |
| September 20 | 90.0°F (2022) | 35.1°F (2006) | 2.69 in (2018) |
| September 21 | 88.0°F (2005) | 32.0°F (1999) | 1.31 in (2016) |
| September 22 | 90.0°F (2017) | 39.0°F (2012) | 0.68 in (2006) |
| September 23 | 84.9°F (2017) | 32.0°F (2012) | 2.60 in (2023) |
| September 24 | 87.1°F (2017) | 30.9°F (2000) | 1.69 in (2010) |
| September 25 | 82.9°F (2020) | 30.0°F (2001) | 1.12 in (2005) |
| September 26 | 82.9°F (2008) | 35.1°F (2001) | 0.80 in (2002) |
| September 27 | 82.0°F (2013) | 35.1°F (2012) | 0.41 in (2007) |
| September 28 | 84.0°F (2024) | 30.9°F (2022) | 0.49 in (1997) |
| September 29 | 86.0°F (2025) | 33.1°F (2018) | 1.60 in (2023) |
| September 30 | 86.0°F (2023) | 30.9°F (2003) | 0.40 in (2019) |