Fort Duchesne, UT Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Fort Duchesne's primary NOAA station, FT DUCHESNE.
The climate verdict for Fort Duchesne
Winter sets the terms in Fort Duchesne, Utah. A pronounced 56.9°F seasonal swing and heating demand above twice the cooling total frame an annual average of 47°F. At 40/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 6% of scores.
- 47°F
- yearly average temperature, NOAA normal
- 40/100
- comfort score, above 6% of station-mapped location scores
- 6.0"
- yearly precipitation total
- 136 days
- growing season, frost-free days
Fort Duchesne: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00422996 · Fort Duchesne, UT 47°F mean · 6.0" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 47°F
- RANK-COOL #1,784
- PHOTO-FINISH ≈ Rapid City Rgnl
- PRCP-ARID 6.0"
- SWING-WIDE 57°F
- COMF-LOW 40/100
- LOAD-HEAT 7,258 HDD
- STN-1 USC00422996
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Rapid City Rgnl, SD (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every UT station list.
- Fort Duchesne (this station) 47°F
- Cold Sullivan, WI 47°F
- Hot Platteville, WI 47°F
- Near Rapid City Rgnl, SD 47°F
- Near Forsyth, MT 47°F
Climate Living Index · Fort Duchesne
Fort Duchesne: 12/100 · grade F
Fort Duchesne publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Fort Duchesne, not an official NOAA rating. Rankings still use Comfort Score 40/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 46.7°F · 20.8° from 67.5°F | 26/100 · F |
| Frost-free season | 136 days/year | 16/100 · F |
| Precipitation balance | 6.0 in · 29.0 from 35 in | 3/100 · F |
| Normal heat + freeze calendar | 228 calendar days | 2/100 · F |
Fort Duchesne · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Fort Duchesne's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 73.6°F
- Coldest month
- 16.7°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Fort Duchesne sits across the climate record
Three NOAA fields for Fort Duchesne's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 74%
- Among 6,861 stations, Fort Duchesne sits in the cooler third of annual means.
- Annual precipitation
- Drier than 99%
- Fort Duchesne's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 94%
- Warmest-to-coldest month gap for Fort Duchesne is large versus 6,861 complete station-years.
How Fort Duchesne compares across U.S. station-mapped locations
Fort Duchesne's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
40 6th percentile score exceeds 6% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Fort Duchesne's measured station temperature trend
MethodologyAcross 59 complete annual observations from 1895 to 2024, FT DUCHESNE warmed at a fitted rate of 0.24°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Fort Duchesne primary station fitted change +0.24 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 29°F (-2°C) | 5°F (-15°C) | 17°F (-8°C) | 0.4" | 30.9 | 0.0 |
| February | 38°F (3°C) | 13°F (-11°C) | 25°F (-4°C) | 0.4" | 27.4 | 0.0 |
| March | 53°F (12°C) | 24°F (-4°C) | 39°F (4°C) | 0.4" | 27.1 | 0.0 |
| April | 63°F (17°C) | 31°F (0°C) | 47°F (8°C) | 0.5" | 15.9 | 0.0 |
| May | 73°F (23°C) | 40°F (4°C) | 56°F (13°C) | 0.6" | 4.0 | 0.9 |
| June | 85°F (29°C) | 47°F (8°C) | 66°F (19°C) | 0.4" | 0.8 | 12.0 |
| July | 92°F (33°C) | 55°F (13°C) | 74°F (23°C) | 0.3" | 0.1 | 23.4 |
| August | 89°F (32°C) | 53°F (12°C) | 71°F (22°C) | 0.6" | 0.1 | 19.1 |
| September | 79°F (26°C) | 44°F (7°C) | 62°F (17°C) | 0.8" | 1.3 | 4.0 |
| October | 64°F (18°C) | 33°F (1°C) | 49°F (9°C) | 0.9" | 14.8 | 0.0 |
| November | 47°F (8°C) | 21°F (-6°C) | 34°F (1°C) | 0.3" | 28.2 | 0.0 |
| December | 32°F (0°C) | 10°F (-12°C) | 21°F (-6°C) | 0.4" | 31.0 | 0.0 |
The year, day by day
Fort Duchesne works both ends of the calendar. Normal highs climb to 93°F by July 21 and hold at or above 90°F on 43 dates, then normal lows drop to freezing or below on 185 dates, bottoming at 4°F around January 10.
When the heat sits
Normal highs reach 90°F from July 2 through August 13, covering 43 dates. The broader mild season, normal highs of 70°F or more, runs May 9 to October 5.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into April 20, then returns to freezing around October 19, covering 185 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is January 5, when 15% of years recorded at least a hundredth of an inch. The driest is June 26 at 8%. Summed across the calendar, that is about 45 wet dates a year.
The widest day
June 23 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Fort Duchesne.
Where Fort Duchesne Stands Nationally
Aridity defines the water calendar: about 6 inches in a normal year lands this among the driest tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 38°F, sharper than nine in ten ranked stations see.
Fort Duchesne earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
4.5 days with precipitation
4.4 days with precipitation
2.9 days with precipitation
3.5 days with precipitation
4.3 days with precipitation
2.4 days with precipitation
3.4 days with precipitation
4.6 days with precipitation
3.8 days with precipitation
4.1 days with precipitation
2.8 days with precipitation
4.0 days with precipitation
Fort Duchesne spreads its precipitation across the year
Neither half of the year dominates here: June through August take 22% of the annual total and December through February 20%, with neither reaching the 35% that would mark a distinct wet season. Fort Duchesne has no dry season to plan around, though it does carry a wide 56.9°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 0.9" and July 0.3". The three wettest months together take 38% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
Fort Duchesne is dry, and what does fall arrives gently
Only about 45 days a year record measurable precipitation here, 12% of the calendar, and they carry 6.0" between them. At roughly 0.13 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is August at about 5 wet days; the driest is June at about 2.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
October 2
50% probability date
Last Spring Freeze
May 19
50% probability date
Growing Season
136 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,258
Higher = more heating needed
Cooling Degree Days
608
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside UT closest to Fort Duchesne on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (47°F here).
- Allison, IA 47°F · 0.0°F off
- American Falls, ID 47°F · 0.0°F off
- Cherokee, IA 47°F · 0.0°F off
- Forsyth, MT 47°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (6.0" here), excluding temperature-peer places.
- Buttonwillow, CA 6.0" · 0.0" off
- Taft, CA 6.0" · 0.0" off
- Bunkerville, NV 5.9" · 0.1" off
- Topaz Lake, NV 5.9" · 0.1" off
Scarce-water calendar
Where Fort Duchesne's limited precipitation lands
heating led · dry · high swing
Winter and seasonal range jointly define this record. Fort Duchesne logs 7,258 heating degree days, more than twice its 608 cooling total, while the typical coldest-to-warmest-month gap reaches 56.9°F. The annual mean therefore compresses two materially different seasons.
Only about 136 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
July and January mark the typical warm and cold ends of the calendar in this dry, high-range record. The gap is 56.9°F, so a single annual figure is especially lossy; the annual average is 47°f. Compare monthly temperature and precipitation together before drawing a seasonal conclusion about Fort Duchesne.
Fort Duchesne's cold-season load does not imply a wet climate. Annual precipitation is 6.0 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Fort Duchesne wettest normal
October
October concentrates the scarce annual total (6.0 inches).
Fort Duchesne driest normal
July
July is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Fort Duchesne's climate
How dry is Fort Duchesne? ▼
How many days above 90°F does Fort Duchesne get? ▼
How much energy does heating and cooling require in Fort Duchesne? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Fort Duchesne's primary station: FT DUCHESNE (USC00422996). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 4926610), not an incorporated municipality. Match rule for Fort Duchesne: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Fort Duchesne comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.