Duchesne County Weather in September
Average highs run from 77°F on September 1 to 65°F on September 30, and lows from 46°F to 36°F. Normal precipitation for the month is 1.24 in over about 6 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
- 71°F
- Average low
- 41°F
- Precipitation
- 1.24 in
- Snowfall
- 0.1 in
- Record high
- 97°FSep 5, 2020
- Record low
- 16°FSep 25, 1926
- Chance of a freeze
- 77%
- Daylight
- 13 h 04 min to 11 h 48 min
- Cloud cover
- 42%
- Humidity
- 50%
- Dew point
- 29°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 | 77°F | 46°F | 93°F 1940 | 32°F 1908 | 20% | 0% |
| Sep 2 | 76°F | 46°F | 93°F 1970 | 35°F 1908 | 20% | 0% |
| Sep 3 | 76°F | 46°F | 93°F 2017 | 34°F 1934 | 20% | 0% |
| Sep 4 | 76°F | 45°F | 95°F 2022 | 35°F 1953 | 20% | 0% |
| Sep 5 | 75°F | 45°F | 97°F 2020 | 28°F 1932 | 20% | 0% |
| Sep 6 | 75°F | 45°F | 95°F 2022 | 29°F 1910 | 20% | 0% |
| Sep 7 | 75°F | 44°F | 95°F 2022 | 33°F 1923 | 20% | 0% |
| Sep 8 | 74°F | 44°F | 92°F 2022 | 32°F 1911 | 20% | 0% |
| Sep 9 | 74°F | 44°F | 91°F 1923 | 28°F 1962 | 20% | 0% |
| Sep 10 | 73°F | 43°F | 92°F 1923 | 30°F 1920 | 20% | 0% |
| Sep 11 | 73°F | 43°F | 89°F 1958 | 29°F 1916 | 20% | 0% |
| Sep 12 | 73°F | 43°F | 89°F 1955 | 29°F 1916 | 20% | 0% |
| Sep 13 | 72°F | 42°F | 93°F 1990 | 31°F 1951 | 20% | 0% |
| Sep 14 | 72°F | 42°F | 92°F 1990 | 24°F 1915 | 20% | 0% |
| Sep 15 | 72°F | 42°F | 90°F 1956 | 25°F 1912 | 20% | 0% |
| Sep 16 | 71°F | 41°F | 88°F 1922 | 26°F 1912 | 19% | 0% |
| Sep 17 | 71°F | 41°F | 89°F 1922 | 25°F 1965 | 19% | 0% |
| Sep 18 | 70°F | 40°F | 89°F 1935 | 17°F 1965 | 19% | 0% |
| Sep 19 | 70°F | 40°F | 88°F 1935 | 22°F 1924 | 19% | 0% |
| Sep 20 | 69°F | 40°F | 88°F 1953 | 21°F 1983 | 19% | 0% |
| Sep 21 | 69°F | 39°F | 87°F 1966 | 21°F 1924 | 19% | 0% |
| Sep 22 | 68°F | 39°F | 88°F 1966 | 24°F 1912 | 18% | 0% |
| Sep 23 | 68°F | 39°F | 87°F 2015 | 25°F 1931 | 18% | 0% |
| Sep 24 | 68°F | 38°F | 89°F 2015 | 26°F 1946 | 18% | 0% |
| Sep 25 | 67°F | 38°F | 86°F 1983 | 16°F 1926 | 18% | 0% |
| Sep 26 | 67°F | 37°F | 86°F 1947 | 23°F 1926 | 18% | 0% |
| Sep 27 | 66°F | 37°F | 84°F 2015 | 19°F 1908 | 18% | 0% |
| Sep 28 | 66°F | 37°F | 85°F 2015 | 23°F 1908 | 18% | 0% |
| Sep 29 | 65°F | 36°F | 89°F 1969 | 21°F 1945 | 18% | 0% |
| Sep 30 | 65°F | 36°F | 85°F 1952 | 21°F 1921 | 17% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:49 AM, sunset 7:53 PM
- September 30
- sunrise 7:17 AM, sunset 7:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00420074 (Altamont), public domain. Records: NOAA GHCN-Daily, station USC00422253, 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.