Alpine Weather in September
Average highs run from 87°F on September 1 to 82°F on September 30, and lows from 61°F to 54°F. Normal precipitation for the month is 2.43 in over about 8 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
- 84°F
- Average low
- 58°F
- Precipitation
- 2.43 in
- Record high
- 104°FSep 2, 2014
- Record low
- 36°FSep 24, 1989
- Chance of a freeze
- 0%
- Days of 90°F or more
- 7.0
- Daylight
- 12 h 46 min to 11 h 53 min
- Cloud cover
- 44%
- Humidity
- 56%
- Dew point
- 52°F
- Wind
- 8.7 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 | 87°F | 61°F | 103°F 2014 | 51°F 2017 | 28% | 0% |
| Sep 2 | 87°F | 61°F | 104°F 2014 | 49°F 1987 | 28% | 0% |
| Sep 3 | 86°F | 61°F | 103°F 2014 | 48°F 1974 | 28% | 0% |
| Sep 4 | 86°F | 61°F | 97°F 2015 | 48°F 1984 | 28% | 0% |
| Sep 5 | 86°F | 61°F | 100°F 1983 | 45°F 1988 | 28% | 0% |
| Sep 6 | 86°F | 60°F | 99°F 1948 | 45°F 1984 | 28% | 0% |
| Sep 7 | 86°F | 60°F | 99°F 1948 | 47°F 2011 | 28% | 0% |
| Sep 8 | 85°F | 60°F | 98°F 2012 | 44°F 2004 | 28% | 0% |
| Sep 9 | 85°F | 60°F | 96°F 2015 | 42°F 2004 | 28% | 0% |
| Sep 10 | 85°F | 59°F | 98°F 1930 | 44°F 2004 | 28% | 0% |
| Sep 11 | 85°F | 59°F | 101°F 1930 | 43°F 1935 | 28% | 0% |
| Sep 12 | 85°F | 59°F | 99°F 1930 | 42°F 1959 | 28% | 0% |
| Sep 13 | 84°F | 59°F | 101°F 1930 | 37°F 1959 | 28% | 0% |
| Sep 14 | 84°F | 58°F | 98°F 2017 | 40°F 1945 | 27% | 0% |
| Sep 15 | 84°F | 58°F | 97°F 2017 | 42°F 1993 | 27% | 0% |
| Sep 16 | 84°F | 58°F | 95°F 2015 | 47°F 1989 | 27% | 0% |
| Sep 17 | 84°F | 58°F | 98°F 2015 | 42°F 1951 | 27% | 0% |
| Sep 18 | 84°F | 57°F | 99°F 2015 | 42°F 1981 | 27% | 0% |
| Sep 19 | 84°F | 57°F | 101°F 1930 | 38°F 1991 | 26% | 0% |
| Sep 20 | 83°F | 57°F | 96°F 1998 | 39°F 1991 | 26% | 0% |
| Sep 21 | 83°F | 56°F | 97°F 1930 | 43°F 1971 | 26% | 0% |
| Sep 22 | 83°F | 56°F | 96°F 1933 | 37°F 1995 | 26% | 0% |
| Sep 23 | 83°F | 56°F | 93°F 1930 | 38°F 1975 | 25% | 0% |
| Sep 24 | 83°F | 56°F | 95°F 1977 | 36°F 1989 | 25% | 0% |
| Sep 25 | 83°F | 55°F | 99°F 1931 | 41°F 1975 | 25% | 0% |
| Sep 26 | 83°F | 55°F | 99°F 1977 | 40°F 1970 | 24% | 0% |
| Sep 27 | 83°F | 55°F | 97°F 1977 | 38°F 1989 | 24% | 0% |
| Sep 28 | 82°F | 54°F | 97°F 1977 | 37°F 1970 | 24% | 0% |
| Sep 29 | 82°F | 54°F | 98°F 1977 | 36°F 1945 | 23% | 0% |
| Sep 30 | 82°F | 54°F | 98°F 1977 | 36°F 1945 | 23% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 7:31 AM, sunset 8:17 PM
- September 30
- sunrise 7:48 AM, sunset 7:41 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00410174 (Alpine), public domain. Records: NOAA GHCN-Daily, station USC00410174, 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.