September
September · June · August
84climate match
United States · 1991–2020
Best time to visit
Duchesne.
September leads for comfortable weather in Duchesne: typically 24.3°C by day, 7.5°C at night, with 30 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.3°C
Typical low7.5°C
Rain in September30 mm
August
August · July · June
72climate match
May
May · September · June
83climate match
The weakest month is January, scoring 5 against September’s 84 — days reach only 0.2°C, 24° below the 24°C the score treats as ideal, and nights drop to -12.3°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
50.2° / -12.3°
Feb
54.4° / -8.7°
Mar
2812.2° / -3.2°
Apr
4916.7° / 0.5°
May
7321.7° / 5.3°
Jun
7827.6° / 9.3°
Jul
7330.6° / 13.1°
Aug
7629° / 12.2°
Sep
8424.3° / 7.5°
Oct
5116.9° / 1.1°
Nov
128.3° / -5.3°
Dec
50.9° / -11°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 0.2°C | -12.3°C | 13 mm | 3.5 | 9 h 36 | 5 | Strong coverage |
| February | 4.4°C | -8.7°C | 13 mm | 3.4 | 10 h 37 | 5 | Strong coverage |
| March | 12.2°C | -3.2°C | 16 mm | 2.9 | 11 h 49 | 28 | Strong coverage |
| April | 16.7°C | 0.5°C | 21 mm | 4.2 | 13 h 13 | 49 | Strong coverage |
| May | 21.7°C | 5.3°C | 31 mm | 5.5 | 14 h 23 | 73 | Strong coverage |
| June | 27.6°C | 9.3°C | 17 mm | 3.1 | 15 h 01 | 78 | Strong coverage |
| July | 30.6°C | 13.1°C | 24 mm | 4.8 | 14 h 46 | 73 | Strong coverage |
| August | 29°C | 12.2°C | 34 mm | 6.3 | 13 h 45 | 76 | Strong coverage |
| September | 24.3°C | 7.5°C | 30 mm | 5.2 | 12 h 24 | 84 | Strong coverage |
| October | 16.9°C | 1.1°C | 23 mm | 4 | 11 h 04 | 51 | Strong coverage |
| November | 8.3°C | -5.3°C | 12 mm | 2.8 | 9 h 54 | 12 | Strong coverage |
| December | 0.9°C | -11°C | 14 mm | 3.2 | 9 h 20 | 5 | Strong coverage |
What has changed
Duchesne runs +0.8°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+1.2
Feb
+1.7
Mar
+2.1
Apr
+0.5
May
-0.7
Jun
+1.5
Jul
0.0
Aug
-0.3
Sep
+0.8
Oct
-0.1
Nov
+1.4
Dec
+1.9
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 16.1°C31 Jan 1971 | -41.7°C9 Jan 1937 | 51 mm1 Jan 1937 | 65 mm1937 · driest 0 mm in 1961 | 113 |
| February | 22.8°C25 Feb 1986 | -40.0°C10 Feb 1933 | 25 mm18 Feb 1927 | 85 mm1927 · driest 0 mm in 1924 | 113 |
| March | 30.6°C25 Mar 2026 | -26.7°C2 Mar 1922 | 28 mm3 Mar 1927 | 55 mm1939 · driest 0 mm in 1934 | 113 |
| April | 28.9°C24 Apr 2012 | -15.6°C3 Apr 1945 | 28 mm16 Apr 2013 | 78 mm1986 · driest 0 mm in 1924 | 114 |
| May | 33.9°C29 May 1984 | -9.4°C1 May 1967 | 44 mm30 May 1937 | 92 mm2015 · driest 0 mm in 1927 | 114 |
| June | 37.2°C21 Jun 1961 | -3.9°C1 Jun 1923 | 33 mm7 Jun 1941 | 80 mm1965 · driest 0 mm in 1920 | 114 |
| July | 38.3°C13 Jul 2002 | 1.7°C2 Jul 1908 | 38 mm7 Jul 2006 | 83 mm2011 · driest 0 mm in 1928 | 113 |
| August | 38.3°C4 Aug 1970 | -3.3°C31 Aug 1908 | 44 mm23 Aug 1995 | 117 mm1999 · driest 0 mm in 1950 | 112 |
| September | 36.1°C5 Sep 2020 | -8.9°C25 Sep 1926 | 43 mm1 Sep 1909 | 117 mm1940 · driest 0 mm in 1935 | 112 |
| October | 29.4°C5 Oct 1947 | -16.1°C30 Oct 2019 | 42 mm12 Oct 1928 | 89 mm1981 · driest 0 mm in 1952 | 112 |
| November | 22.8°C7 Nov 1980 | -27.2°C24 Nov 1931 | 33 mm3 Nov 1957 | 59 mm1906 · driest 0 mm in 1929 | 112 |
| December | 17.2°C22 Dec 2025 | -39.4°C9 Dec 1919 | 42 mm30 Dec 1951 | 71 mm1951 · driest 0 mm in 1930 | 112 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 4 |
| February | 0 | 0 | 27 | <1 | 4 |
| March | <1 | 0 | 25 | <1 | 2 |
| April | 1 | 0 | 14 | <1 | 1 |
| May | 8 | <1 | 2 | <1 | <1 |
| June | 21 | 10 | <1 | <1 | 0 |
| July | 29 | 20 | 0 | <1 | 0 |
| August | 27 | 12 | 0 | <1 | 0 |
| September | 14 | 2 | <1 | <1 | 0 |
| October | 1 | 0 | 13 | <1 | <1 |
| November | 0 | 0 | 27 | <1 | 2 |
| December | 0 | 0 | 31 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | <1% | 7% | -4.7–4.2°C |
| February | <1% | 12% | <1% | 7% | -1.6–8.6°C |
| March | 5% | 11% | 1% | 6% | 6.2–14.3°C |
| April | 30% | 13% | 1% | 9% | 13.5–19.7°C |
| May | 65% | 14% | 2% | 11% | 19.1–24.5°C |
| June | 85% | 11% | 2% | 9% | 24.5–30.3°C |
| July | 85% | 16% | 2% | 14% | 29.0–32.4°C |
| August | 81% | 19% | 2% | 18% | 27.6–30.8°C |
| September | 77% | 15% | 3% | 12% | 22.5–26.8°C |
| October | 33% | 12% | 2% | 9% | 14.8–20.0°C |
| November | <1% | 9% | <1% | 4% | 5.3–11.4°C |
| December | 0% | 11% | <1% | 5% | -3.7–5.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 5774135
- NOAA station
- USC00422253 · DUCHESNE
- Station distance
- 0.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 40.16°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.