September weather in Sheridan, MT
The average temperature in Sheridan in September is 55.1°F (41.5°F–68.8°F). Average precipitation: 1.21 inches.
September is a fall month in Sheridan, and is warmer than the annual average of 43°F. Daily temperatures swing about 27.3°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
68.8°F
Avg Low
41.5°F
Precipitation
1.21 in
Daylight
12h 18m
September records in Sheridan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2022) | 39.9°F (2020) | 0.42 in (2012) |
| September 2 | 87.1°F (2017) | 35.1°F (2010) | 0.04 in (2012) |
| September 3 | 95.0°F (2022) | 34.0°F (2011) | 0.35 in (2024) |
| September 4 | 95.0°F (2022) | 32.0°F (2014) | 0.25 in (2016) |
| September 5 | 93.0°F (2020) | 33.1°F (2014) | 0.17 in (2015) |
| September 6 | 91.0°F (2022) | 32.0°F (2010) | 0.70 in (2019) |
| September 7 | 91.9°F (2022) | 35.1°F (2015) | 0.04 in (2023) |
| September 8 | 89.1°F (2021) | 30.0°F (2020) | 0.14 in (2010) |
| September 9 | 88.0°F (2021) | 28.0°F (2020) | 0.48 in (2010) |
| September 10 | 86.0°F (2021) | 35.1°F (2020) | 0.07 in (2010) |
| September 11 | 84.9°F (2022) | 32.0°F (2014) | 0.13 in (2019) |
| September 12 | 84.0°F (2017) | 24.1°F (2014) | 0.96 in (2024) |
| September 13 | 84.0°F (2015) | 28.9°F (2014) | 0.23 in (2017) |
| September 14 | 84.9°F (2020) | 3.9°F (2024) | 0.60 in (2016) |
| September 15 | 82.0°F (2019) | 35.1°F (2014) | 0.61 in (2017) |
| September 16 | 79.0°F (2023) | 37.9°F (2017) | 1.09 in (2015) |
| September 17 | 79.0°F (2021) | 30.9°F (2017) | 0.58 in (2013) |
| September 18 | 81.0°F (2009) | 35.1°F (2018) | 0.42 in (2024) |
| September 19 | 78.1°F (2010) | 34.0°F (2013) | 0.46 in (2020) |
| September 20 | 79.0°F (2025) | 28.9°F (2011) | 0.08 in (2016) |
| September 21 | 75.0°F (2012) | 30.9°F (2024) | 0.20 in (2016) |
| September 22 | 79.0°F (2021) | 35.1°F (2009) | 0.67 in (2016) |
| September 23 | 79.0°F (2011) | 35.1°F (2010) | 0.91 in (2022) |
| September 24 | 81.0°F (2014) | 32.0°F (2018) | 0.46 in (2013) |
| September 25 | 84.0°F (2015) | 30.0°F (2017) | 0.00 in (2009) |
| September 26 | 82.9°F (2021) | 27.0°F (2013) | 0.03 in (2019) |
| September 27 | 82.0°F (2021) | 34.0°F (2017) | 0.90 in (2014) |
| September 28 | 82.0°F (2022) | 30.0°F (2009) | 0.22 in (2014) |
| September 29 | 84.0°F (2022) | 26.1°F (2019) | 0.31 in (2019) |
| September 30 | 84.0°F (2022) | 26.1°F (2019) | 0.48 in (2009) |