September weather in Green Mountain Falls, CO
The average temperature in Green Mountain Falls in September is °F (°F–°F). Average precipitation: 2.06 inches.
September is a fall month in Green Mountain Falls, and is cooler than the annual average of 0°F. Expect about 8 days with precipitation. Daylight averages about 12h 14m.
Avg High
°F
Avg Low
°F
Precipitation
2.06 in
Daylight
12h 14m
September records in Green Mountain Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 115.3°F (2009) | 33.1°F (2004) | 0.80 in (2018) |
| September 2 | 122.9°F (2006) | 6.1°F (2008) | 0.60 in (2011) |
| September 3 | 122.9°F (2006) | 16.2°F (2006) | 0.40 in (2021) |
| September 4 | 121.1°F (2006) | 28.4°F (2009) | 0.40 in (2007) |
| September 5 | 105.3°F (2009) | 12.6°F (2008) | 0.70 in (2007) |
| September 6 | 109.6°F (2007) | 23.4°F (2007) | 0.70 in (2019) |
| September 7 | 120.9°F (2006) | 31.5°F (2020) | 0.10 in (2005) |
| September 8 | 110.3°F (2009) | 14.4°F (2020) | 0.90 in (2020) |
| September 9 | 101.8°F (2009) | 13.6°F (2020) | 0.20 in (2009) |
| September 10 | 113.7°F (2006) | 17.1°F (2006) | 1.10 in (2023) |
| September 11 | 120.0°F (2006) | 5.9°F (2006) | 0.90 in (2023) |
| September 12 | 99.0°F (2008) | 30.7°F (2006) | 1.80 in (2012) |
| September 13 | 118.2°F (2006) | 29.3°F (2008) | 0.40 in (2013) |
| September 14 | 99.7°F (2009) | 16.2°F (2008) | 0.80 in (2011) |
| September 15 | 115.9°F (2008) | 10.2°F (2008) | 0.80 in (2023) |
| September 16 | 93.6°F (2009) | 22.5°F (2023) | 0.60 in (2009) |
| September 17 | 109.8°F (2008) | -3.6°F (2006) | 0.50 in (2025) |
| September 18 | 102.0°F (2009) | 22.3°F (2006) | 0.30 in (2013) |
| September 19 | 100.8°F (2009) | 26.8°F (2009) | 0.20 in (2008) |
| September 20 | 107.8°F (2008) | 21.7°F (2008) | 0.60 in (2006) |
| September 21 | 109.6°F (2006) | 6.1°F (2009) | 1.20 in (2006) |
| September 22 | 108.7°F (2006) | 3.4°F (2009) | 1.20 in (2006) |
| September 23 | 71.4°F (2009) | 5.4°F (2009) | 0.50 in (2013) |
| September 24 | 106.3°F (2008) | 7.2°F (2009) | 0.10 in (2007) |
| September 25 | 113.0°F (2008) | 21.2°F (2009) | 0.20 in (2012) |
| September 26 | 83.3°F (2008) | 4.6°F (2006) | 0.10 in (2008) |
| September 27 | 115.7°F (2006) | 4.3°F (2006) | 0.40 in (2017) |
| September 28 | 118.4°F (2006) | 17.1°F (2020) | 0.30 in (2005) |
| September 29 | 98.4°F (2009) | 27.9°F (2014) | 0.50 in (2014) |
| September 30 | 102.4°F (2009) | 18.9°F (2007) | 0.20 in (2016) |