September weather in Cheyenne, WY
The average temperature in Cheyenne in September is 58.9°F (45.3°F–72.5°F). Average precipitation: 1.55 inches. Average snowfall is 0.2 inches.
September is a fall month in Cheyenne, and is warmer than the annual average of 46.6°F. Daily temperatures swing about 27.2°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
72.5°F
Avg Low
45.3°F
Precipitation
1.55 in
Snow
0.2 in
September records in Cheyenne
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2019) | 39.9°F (2006) | 0.24 in (2008) |
| September 2 | 95.0°F (2019) | 34.0°F (2006) | 0.30 in (2007) |
| September 3 | 91.0°F (2017) | 37.0°F (2010) | 0.16 in (2021) |
| September 4 | 91.9°F (2022) | 39.0°F (2006) | 0.52 in (2004) |
| September 5 | 93.9°F (2022) | 39.9°F (2008) | 0.33 in (2007) |
| September 6 | 93.0°F (2022) | 41.0°F (2004) | 0.74 in (2009) |
| September 7 | 93.9°F (2022) | 30.9°F (2020) | 0.62 in (2003) |
| September 8 | 93.0°F (2022) | 26.1°F (2020) | 0.40 in (2020) |
| September 9 | 87.1°F (2017) | 26.1°F (2020) | 0.73 in (2013) |
| September 10 | 93.9°F (2021) | 28.0°F (2020) | 0.95 in (2006) |
| September 11 | 88.0°F (2021) | 28.0°F (2014) | 1.10 in (2013) |
| September 12 | 89.1°F (2017) | 28.0°F (2014) | 0.68 in (2008) |
| September 13 | 87.1°F (2018) | 34.0°F (2014) | 1.45 in (2013) |
| September 14 | 86.0°F (2018) | 34.0°F (2003) | 0.62 in (2013) |
| September 15 | 87.1°F (2018) | 37.9°F (2008) | 0.94 in (2013) |
| September 16 | 88.0°F (2018) | 37.9°F (2004) | 0.07 in (2007) |
| September 17 | 84.9°F (2014) | 32.0°F (2003) | 0.18 in (2003) |
| September 18 | 84.0°F (2004) | 28.0°F (2003) | 0.01 in (2013) |
| September 19 | 86.0°F (2010) | 33.1°F (2003) | 0.05 in (2018) |
| September 20 | 84.0°F (2010) | 37.0°F (2013) | 0.15 in (2004) |
| September 21 | 82.9°F (2015) | 33.1°F (2009) | 0.67 in (2004) |
| September 22 | 82.9°F (2018) | 33.1°F (2003) | 0.15 in (2013) |
| September 23 | 82.0°F (2018) | 32.0°F (2006) | 0.55 in (2013) |
| September 24 | 82.9°F (2020) | 28.0°F (2006) | 0.41 in (2017) |
| September 25 | 82.0°F (2011) | 33.1°F (2006) | 0.10 in (2017) |
| September 26 | 88.0°F (2010) | 33.1°F (2018) | 0.11 in (2012) |
| September 27 | 86.0°F (2015) | 33.1°F (2013) | 0.41 in (2012) |
| September 28 | 89.1°F (2010) | 30.0°F (2009) | 0.58 in (2014) |
| September 29 | 82.0°F (2018) | 34.0°F (2008) | 0.90 in (2014) |
| September 30 | 82.0°F (2011) | 35.1°F (2005) | 0.80 in (2004) |