September weather in Cook, MN
The average temperature in Cook in September is 55.4°F (45.7°F–65.2°F). Average precipitation: 3.25 inches.
September is a fall month in Cook, and is warmer than the annual average of 38°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
65.2°F
Avg Low
45.7°F
Precipitation
3.25 in
Daylight
12h 20m
September records in Cook
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 86.0°F (2008) | 43.0°F (2009) | 0.62 in (2020) |
| September 2 | 86.0°F (2008) | 46.0°F (2014) | 0.59 in (2017) |
| September 3 | 91.9°F (2023) | 42.1°F (2005) | 1.30 in (2002) |
| September 4 | 91.0°F (2023) | 39.9°F (2025) | 1.04 in (1999) |
| September 5 | 87.1°F (2012) | 36.0°F (2010) | 0.86 in (2004) |
| September 6 | 88.0°F (2007) | 37.0°F (2025) | 1.03 in (2004) |
| September 7 | 84.0°F (2001) | 35.1°F (2025) | 3.65 in (2007) |
| September 8 | 93.0°F (2002) | 34.0°F (2020) | 0.13 in (2001) |
| September 9 | 91.0°F (2002) | 34.0°F (2020) | 1.54 in (2025) |
| September 10 | 82.9°F (2003) | 36.0°F (2020) | 1.27 in (2019) |
| September 11 | 80.1°F (2024) | 32.0°F (1999) | 0.54 in (2010) |
| September 12 | 88.0°F (2005) | 36.0°F (2007) | 2.81 in (2003) |
| September 13 | 82.0°F (2024) | 35.1°F (2014) | 2.46 in (2019) |
| September 14 | 81.0°F (2004) | 32.0°F (2007) | 0.42 in (2008) |
| September 15 | 82.9°F (2024) | 30.0°F (2011) | 0.41 in (2017) |
| September 16 | 82.0°F (2024) | 30.0°F (2011) | 0.72 in (2004) |
| September 17 | 86.0°F (2024) | 32.0°F (2011) | 0.52 in (2006) |
| September 18 | 84.9°F (2024) | 30.0°F (2020) | 1.31 in (2015) |
| September 19 | 86.0°F (2000) | 30.0°F (2020) | 1.58 in (2003) |
| September 20 | 84.9°F (2021) | 35.1°F (2006) | 0.73 in (2005) |
| September 21 | 80.1°F (2023) | 27.0°F (1999) | 2.05 in (2021) |
| September 22 | 78.1°F (2015) | 33.1°F (1999) | 0.68 in (2025) |
| September 23 | 79.0°F (2017) | 30.9°F (2012) | 0.43 in (2000) |
| September 24 | 73.0°F (2014) | 28.9°F (1999) | 1.67 in (2023) |
| September 25 | 80.1°F (2017) | 32.0°F (2000) | 0.62 in (2018) |
| September 26 | 77.0°F (2024) | 28.9°F (2003) | 1.30 in (1999) |
| September 27 | 82.0°F (2024) | 28.0°F (2003) | 0.78 in (2016) |
| September 28 | 81.0°F (2014) | 30.9°F (1999) | 0.77 in (2009) |
| September 29 | 81.0°F (2024) | 28.0°F (1999) | 0.44 in (2014) |
| September 30 | 82.0°F (2025) | 28.0°F (2018) | 0.73 in (2011) |