Mount Crested Butte Weather in September
Average highs run from 70°F on September 1 to 61°F on September 30, and lows from 35°F to 27°F. Normal precipitation for the month is 1.95 in over about 10 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 66°F
- Average low
- 31°F
- Precipitation
- 1.95 in
- Snowfall
- 1.2 in
- Record high
- 89°FSep 3, 2019
- Record low
- 17°FSep 29, 1999
- Chance of a freeze
- 100%
- Daylight
- 13 h 01 min to 11 h 49 min
- Cloud cover
- 48%
- Humidity
- 57%
- Dew point
- 28°F
- Wind
- 4.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 70°F | 35°F | 87°F 2019 | 36°F 2010 | 35% | 1% |
| Sep 2 | 70°F | 35°F | 87°F 2019 | 36°F 2010 | 35% | 1% |
| Sep 3 | 70°F | 35°F | 89°F 2019 | 35°F 2010 | 35% | 1% |
| Sep 4 | 70°F | 34°F | 87°F 2017 | 33°F 2008 | 34% | 1% |
| Sep 5 | 69°F | 34°F | 88°F 2020 | 31°F 1999 | 34% | 1% |
| Sep 6 | 69°F | 34°F | 88°F 2022 | 34°F 2008 | 34% | 1% |
| Sep 7 | 69°F | 34°F | 88°F 2022 | 30°F 2010 | 34% | 1% |
| Sep 8 | 68°F | 33°F | 86°F 2022 | 30°F 2001 | 34% | 1% |
| Sep 9 | 68°F | 33°F | 86°F 2021 | 28°F 2001 | 34% | 1% |
| Sep 10 | 68°F | 33°F | 87°F 2021 | 31°F 2001 | 33% | 1% |
| Sep 11 | 68°F | 33°F | 83°F 2021 | 28°F 2010 | 33% | 2% |
| Sep 12 | 67°F | 32°F | 82°F 2017 | 32°F 2010 | 33% | 2% |
| Sep 13 | 67°F | 32°F | 83°F 2026 | 29°F 2003 | 33% | 2% |
| Sep 14 | 67°F | 32°F | 85°F 2000 | 27°F 2003 | 32% | 2% |
| Sep 15 | 66°F | 31°F | 84°F 2018 | 28°F 2004 | 32% | 2% |
| Sep 16 | 66°F | 31°F | 83°F 2000 | 30°F 2006 | 32% | 2% |
| Sep 17 | 66°F | 31°F | 82°F 2018 | 26°F 2006 | 31% | 2% |
| Sep 18 | 65°F | 31°F | 82°F 2018 | 24°F 2003 | 31% | 3% |
| Sep 19 | 65°F | 30°F | 81°F 2016 | 27°F 2003 | 31% | 3% |
| Sep 20 | 65°F | 30°F | 80°F 2014 | 31°F 2002 | 30% | 3% |
| Sep 21 | 64°F | 30°F | 78°F 2015 | 28°F 2021 | 30% | 3% |
| Sep 22 | 64°F | 29°F | 78°F 2016 | 28°F 2009 | 29% | 3% |
| Sep 23 | 64°F | 29°F | 78°F 2015 | 31°F 2000 | 29% | 4% |
| Sep 24 | 63°F | 29°F | 79°F 2015 | 25°F 2006 | 29% | 4% |
| Sep 25 | 63°F | 29°F | 79°F 2001 | 22°F 2000 | 28% | 4% |
| Sep 26 | 62°F | 28°F | 79°F 2014 | 23°F 2017 | 28% | 4% |
| Sep 27 | 62°F | 28°F | 80°F 2014 | 25°F 1999 | 28% | 5% |
| Sep 28 | 62°F | 28°F | 78°F 2001 | 19°F 1999 | 27% | 5% |
| Sep 29 | 61°F | 27°F | 79°F 2024 | 17°F 1999 | 27% | 5% |
| Sep 30 | 61°F | 27°F | 77°F 2001 | 26°F 2007 | 27% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:37 AM, sunset 7:38 PM
- September 30
- sunrise 7:03 AM, sunset 6:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00051959 (Crested Butte), public domain. Records: NOAA GHCN-Daily, station USW00093073, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.