Alpine Weather in September
Average highs run from 76°F on September 1 to 64°F on September 30, and lows from 38°F to 31°F. Normal precipitation for the month is 1.70 in over about 7 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
- 70°F
- Average low
- 34°F
- Precipitation
- 1.70 in
- Record high
- 93°FSep 4, 2022
- Record low
- 10°FSep 12, 1999
- Chance of a freeze
- 98%
- Daylight
- 13 h 10 min to 11 h 46 min
- Cloud cover
- 46%
- Humidity
- 52%
- Dew point
- 33°F
- Wind
- 4.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 76°F | 38°F | 88°F 2022 | 22°F 1975 | 23% |
| Sep 2 | 75°F | 38°F | 88°F 2019 | 25°F 1999 | 23% |
| Sep 3 | 75°F | 37°F | 89°F 2022 | 27°F 1975 | 23% |
| Sep 4 | 75°F | 37°F | 93°F 2022 | 27°F 1989 | 24% |
| Sep 5 | 75°F | 37°F | 90°F 2022 | 26°F 2010 | 24% |
| Sep 6 | 74°F | 37°F | 90°F 2020 | 17°F 1999 | 24% |
| Sep 7 | 74°F | 37°F | 90°F 2022 | 16°F 1999 | 24% |
| Sep 8 | 74°F | 36°F | 92°F 2022 | 17°F 1999 | 25% |
| Sep 9 | 73°F | 36°F | 90°F 2021 | 22°F 2020 | 25% |
| Sep 10 | 73°F | 36°F | 84°F 2013 | 23°F 2020 | 25% |
| Sep 11 | 72°F | 36°F | 84°F 1990 | 24°F 1988 | 25% |
| Sep 12 | 72°F | 35°F | 84°F 1990 | 10°F 1999 | 25% |
| Sep 13 | 72°F | 35°F | 84°F 2022 | 22°F 2014 | 26% |
| Sep 14 | 71°F | 35°F | 85°F 1990 | 23°F 1993 | 26% |
| Sep 15 | 71°F | 35°F | 85°F 2000 | 27°F 2004 | 26% |
| Sep 16 | 70°F | 34°F | 84°F 2020 | 24°F 1987 | 26% |
| Sep 17 | 70°F | 34°F | 81°F 1979 | 20°F 1988 | 26% |
| Sep 18 | 70°F | 34°F | 83°F 1979 | 20°F 1988 | 26% |
| Sep 19 | 69°F | 34°F | 81°F 2014 | 12°F 1983 | 26% |
| Sep 20 | 69°F | 33°F | 78°F 2018 | 12°F 1983 | 26% |
| Sep 21 | 68°F | 33°F | 80°F 1981 | 20°F 1975 | 26% |
| Sep 22 | 68°F | 33°F | 82°F 2001 | 20°F 1996 | 26% |
| Sep 23 | 67°F | 33°F | 83°F 1987 | 20°F 1996 | 26% |
| Sep 24 | 67°F | 32°F | 83°F 1987 | 23°F 2000 | 26% |
| Sep 25 | 66°F | 32°F | 82°F 2001 | 19°F 1996 | 26% |
| Sep 26 | 66°F | 32°F | 83°F 2015 | 20°F 1986 | 26% |
| Sep 27 | 65°F | 31°F | 82°F 2024 | 10°F 1999 | 26% |
| Sep 28 | 65°F | 31°F | 83°F 2010 | 15°F 1985 | 26% |
| Sep 29 | 64°F | 31°F | 84°F 2024 | 16°F 1985 | 26% |
| Sep 30 | 64°F | 31°F | 83°F 1996 | 23°F 2019 | 26% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:49 AM, sunset 7:59 PM
- September 30
- sunrise 7:21 AM, sunset 7:07 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00480603 (Bedford 3 Se), public domain. Records: NOAA GHCN-Daily, station USC00480603, 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.