Duchesne, Utah climate: Normal weather by month, frost dates and records
Duchesne's normal year runs from 11°F January nights to 89°F July afternoons, with 9.4 inches of precipitation and 29 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.9°C, January lows of −12°C, July highs of 31°C, 240 mm of precipitation a year.
- NOAA stationDuchesne
- Station IDUSC00422253
- Location40.17°N 110.40°W
- Elevation5,551 ft (1,692 m)
- Population1,664
On October 23, the normal high in Duchesne is 61°F and the normal low 32°F, and the chance of measurable rain or snow is 17%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Duchesne.
- Jan 33° 11°
- Feb 41° 17°
- Mar 55° 27°
- Apr 63° 34°
- May 73° 42°
- Jun 83° 50°
- Jul 89° 56°
- Aug 86° 55°
- Sep 77° 46°
- Oct 64° 35°
- Nov 48° 23°
- Dec 35° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Duchesne each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 11°F. The most precipitation falls in August (1.35 in), the least in November (0.49 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 11°F | 21.9°F | 0.54 | 7.2 | 5 | <1 | 31 | 9 h 40 min |
| February | 41°F | 17°F | 29.1°F | 0.51 | 5.9 | 5 | <1 | 27 | 10 h 40 min |
| March | 55°F | 27°F | 41.1°F | 0.63 | 2.8 | 4 | <1 | 25 | 11 h 50 min |
| April | 63°F | 34°F | 48.5°F | 0.80 | 1.6 | 6 | <1 | 14 | 13 h 10 min |
| May | 73°F | 42°F | 57.4°F | 1.04 | 0.2 | 7 | <1 | 2 | 14 h 20 min |
| June | 83°F | 50°F | 66.3°F | 0.67 | 0.0 | 5 | 4 | <1 | 15 h |
| July | 89°F | 56°F | 72.4°F | 0.78 | 0.0 | 6 | 11 | <1 | 14 h 50 min |
| August | 86°F | 55°F | 70.1°F | 1.35 | 0.0 | 8 | 4 | <1 | 13 h 50 min |
| September | 77°F | 46°F | 61.6°F | 1.18 | 0.0 | 7 | <1 | 1 | 12 h 30 min |
| October | 64°F | 35°F | 49.3°F | 0.93 | 0.6 | 6 | <1 | 13 | 11 h 10 min |
| November | 48°F | 23°F | 35.8°F | 0.49 | 2.9 | 4 | <1 | 27 | 10 h |
| December | 35°F | 13°F | 23.9°F | 0.53 | 7.9 | 5 | <1 | 31 | 9 h 20 min |
| Year (annual) | 62°F | 34°F | 48.1°F | 9.45 | 29.1 | 67 | 19 | 171 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −12°C | −5.6°C | 14 mm | 18 cm |
| February | 5°C | −8°C | −1.6°C | 13 mm | 15 cm |
| March | 13°C | −3°C | 5.1°C | 16 mm | 7 cm |
| April | 17°C | 1°C | 9.2°C | 20 mm | 4 cm |
| May | 23°C | 6°C | 14.1°C | 26 mm | 1 cm |
| June | 28°C | 10°C | 19.1°C | 17 mm | 0 cm |
| July | 31°C | 13°C | 22.4°C | 20 mm | 0 cm |
| August | 30°C | 13°C | 21.2°C | 34 mm | 0 cm |
| September | 25°C | 8°C | 16.4°C | 30 mm | 0 cm |
| October | 18°C | 2°C | 9.6°C | 24 mm | 2 cm |
| November | 9°C | −5°C | 2.1°C | 12 mm | 7 cm |
| December | 2°C | −11°C | −4.5°C | 13 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00422253; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Duchesne?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, June has the fewest days with rain (5).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00422253.
When is the last frost in Duchesne?
In Duchesne, the last spring frost (32°F) comes after May 6 in half of years and after May 26 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 24 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 61 year in 10 after May 26; 9 in 10 after April 22
- First autumn frost, half of years before
- October 51 year in 10 before September 24; 9 in 10 before October 18
NOAA puts the median frost-free season at 150 days, and the season without a hard freeze (28°F) at 174 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Duchesne in zone 6a in ZIP code 84021, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Duchesne's NOAA station is in zone 6a: the coldest night of a typical year reaches −9°F (30 complete years).
Frost dates for every NOAA station in Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00422253; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Duchesne?
In a normal year in Duchesne, 19 days a year reach 90°F, 171 nights fall to 32°F or colder and 67 days bring measurable precipitation.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 171a normal year
- Days that stay below freezing
- 37high of 32°F or less
- Days with 0.01 inch of precipitation
- 67a normal year
- Days with 1 inch of snow or more
- 11a normal year
The highest temperature in this station's record (since 1906) is 101°F, on July 13, 2002; the lowest is −43°F, on January 9, 1937.
The wettest calendar year on that record is 1927, with 16.69 in; the snowiest season is 1951–52, with 70.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00422253; records: ACIS (NOAA Regional Climate Centers), station USC00422253. Records use complete months only; a month missing more than three days is left out.
How sunny is Duchesne?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Duchesne, 4.8 kWh per square metre a day. September is the sunniest month (83%) and April the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.5 |
| February | 77% | 3.4 |
| March | 76% | 4.7 |
| April | 74% | 5.7 |
| May | 74% | 6.5 |
| June | 83% | 7.6 |
| July | 80% | 7.0 |
| August | 80% | 6.2 |
| September | 83% | 5.3 |
| October | 81% | 3.9 |
| November | 77% | 2.6 |
| December | 74% | 2.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Duchesne need?
A normal year in Duchesne brings 6,663 heating degree days, 24% more than the median U.S. place (5,373), and 533 cooling degree days, 41% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,560 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,334 | 0 |
| February | 1,007 | 0 |
| March | 743 | 0 |
| April | 495 | 0 |
| May | 248 | 11 |
| June | 56 | 95 |
| July | 3 | 232 |
| August | 9 | 166 |
| September | 130 | 29 |
| October | 489 | 0 |
| November | 876 | 0 |
| December | 1,274 | 0 |
| Year (annual) | 6,663 | 533 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00422253. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Duchesne been warmer than normal lately?
2024 averaged 49.6°F, 1.5°F above the 1991-2020 normal of 48.1°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 50.3°F | +2.2°F | 8.31 | 11.4 |
| 2022 | 49.0°F | +0.9°F | 7.03 | 15.8 |
| 2023 | 46.2°F | −1.9°F | 10.01 | – |
| 2024 | 49.6°F | +1.5°F | 9.65 | 15.5 |
Over 71 complete years from 1908 to 2024, the station's annual mean temperature rose at a fitted 1.9°F per century (+0.11°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00422253; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Duchesne's climate compare?
Duchesne is warmer than 41 of the other 96 places with their own NOAA record in Utah, and wetter than 27. Across the 7,247 U.S. stations with normals, its annual mean of 48.1°F is warmer than 32%.
In the Köppen classification computed from these normals, Duchesne is BSk: cold semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Duchesne's climate
What is the coldest month in Duchesne?
January, with a normal high of 33°F and a normal low of 11°F. The warmest is July (89°F by day, 56°F at night).
Does it snow in Duchesne?
Yes: 29 inches in a normal year, falling on 18 days with 0.1 inch or more, the most in December (7.9 inches).
What is the rainiest month in Duchesne?
August, with 1.35 in of precipitation in a normal year; the driest is November with 0.49 in.
What plant hardiness zone is Duchesne in?
The USDA's 2023 map puts Duchesne in zone 6a in ZIP code 84021, the nearest ZIP area. By the same method at Duchesne's NOAA station, the coldest night of a typical year reaches −9°F (30 years, 1991-2020): zone 6a.
How late can frost come in Duchesne?
In half of years the last 32°F night comes after May 6; in one year in ten it comes after May 26. Waiting until May 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Altamont, UT14 miles from this station, 42.2°F a year
- Myton, UT18 miles from this station, 48.0°F a year
- Roosevelt, UT25 miles from this station, 46.2°F a year
- Neola, UT25 miles from this station, 45.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made