Garfield County Weather in September
Average highs run from 78°F on September 1 to 69°F on September 30, and lows from 57°F to 47°F. Normal precipitation for the month is 1.58 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
- 74°F
- Average low
- 52°F
- Precipitation
- 1.58 in
- Record high
- 92°FSep 5, 2020
- Record low
- 13°FSep 18, 1971
- Chance of a freeze
- 10%
- Daylight
- 12 h 59 min to 11 h 49 min
- Cloud cover
- 39%
- Humidity
- 38%
- Dew point
- 33°F
- Wind
- 7.6 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 | 78°F | 57°F | 88°F 2022 | 29°F 1962 | 28% | 0% |
| Sep 2 | 78°F | 56°F | 88°F 2022 | 20°F 1982 | 28% | 0% |
| Sep 3 | 78°F | 56°F | 88°F 2020 | 26°F 1961 | 28% | 0% |
| Sep 4 | 78°F | 56°F | 89°F 2020 | 25°F 1961 | 27% | 0% |
| Sep 5 | 77°F | 56°F | 92°F 2020 | 27°F 2004 | 27% | 0% |
| Sep 6 | 77°F | 55°F | 92°F 2020 | 32°F 1949 | 27% | 0% |
| Sep 7 | 77°F | 55°F | 89°F 2022 | 28°F 1964 | 27% | 0% |
| Sep 8 | 77°F | 55°F | 88°F 2022 | 29°F 2020 | 26% | 0% |
| Sep 9 | 76°F | 54°F | 85°F 1979 | 24°F 2020 | 26% | 0% |
| Sep 10 | 76°F | 54°F | 83°F 2015 | 23°F 2010 | 26% | 0% |
| Sep 11 | 76°F | 54°F | 84°F 2015 | 26°F 2010 | 25% | 0% |
| Sep 12 | 75°F | 54°F | 84°F 1960 | 18°F 1974 | 25% | 0% |
| Sep 13 | 75°F | 53°F | 81°F 1971 | 23°F 1952 | 25% | 0% |
| Sep 14 | 75°F | 53°F | 81°F 1956 | 24°F 1967 | 24% | 0% |
| Sep 15 | 74°F | 52°F | 82°F 1956 | 22°F 1966 | 24% | 0% |
| Sep 16 | 74°F | 52°F | 82°F 1956 | 22°F 1970 | 23% | 0% |
| Sep 17 | 74°F | 52°F | 84°F 1956 | 22°F 2005 | 23% | 0% |
| Sep 18 | 73°F | 51°F | 84°F 1956 | 13°F 1971 | 22% | 0% |
| Sep 19 | 73°F | 51°F | 81°F 1956 | 17°F 1971 | 22% | 0% |
| Sep 20 | 73°F | 51°F | 80°F 1953 | 17°F 1978 | 21% | 0% |
| Sep 21 | 72°F | 50°F | 80°F 1949 | 18°F 1978 | 21% | 0% |
| Sep 22 | 72°F | 50°F | 79°F 1949 | 19°F 2004 | 21% | 0% |
| Sep 23 | 72°F | 49°F | 80°F 1949 | 19°F 2006 | 20% | 0% |
| Sep 24 | 71°F | 49°F | 80°F 2020 | 22°F 2006 | 20% | 0% |
| Sep 25 | 71°F | 49°F | 80°F 2020 | 21°F 2017 | 20% | 0% |
| Sep 26 | 70°F | 48°F | 80°F 2003 | 16°F 1970 | 19% | 0% |
| Sep 27 | 70°F | 48°F | 83°F 2010 | 23°F 1970 | 19% | 0% |
| Sep 28 | 70°F | 47°F | 84°F 2010 | 17°F 1971 | 19% | 0% |
| Sep 29 | 69°F | 47°F | 82°F 2010 | 23°F 1959 | 19% | 0% |
| Sep 30 | 69°F | 47°F | 80°F 2010 | 18°F 1961 | 18% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:56 AM, sunset 7:55 PM
- September 30
- sunrise 7:21 AM, sunset 7:10 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00420849 (Boulder), public domain. Records: NOAA GHCN-Daily, station USW00023159, 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.