Altamont, 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 Altamont's primary NOAA station, ALTAMONT.
The climate verdict for Altamont
Dryness leads the climate profile for Altamont, Utah, with 9.4 inches of precipitation a year. NOAA records an annual average of 42°F. At 29/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 1% of scores.
- 42°F
- annual average temperature (NOAA normal)
- 29/100
- comfort score, above 1% of station-mapped location scores
- 9.4"
- annual precipitation · 39" snow
- 115 days
- growing season, frost-free days
Altamont: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00420074 · Altamont, UT 42°F mean · 9.4" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 42°F
- RANK-COOL #617
- PHOTO-FINISH ≈ Mackay Lost Rvr…
- PRCP-ARID 9.4"
- SWING-WIDE 49°F
- COMF-LOW 29/100
- LOAD-HEAT 8,450 HDD
- STN-1 USC00420074
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Mackay Lost Rvr Ranger Station, ID (+ 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.
- Altamont (this station) 42°F
- Hot Evanston Burns…, WY 42°F
- Near Mackay Lost Rvr…, ID 42°F
- Near Medicine Bow, WY 42°F
- Near Wamsutter, WY 42°F
Climate Living Index · Altamont
Altamont: 12/100 · grade F
Altamont publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Altamont, not an official NOAA rating. Rankings still use Comfort Score 29/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 38.7 inches/year | 29/100 · F |
| Normal heat + freeze calendar | 206 calendar days | 11/100 · F |
| Annual temperature balance | 42.2°F · 25.3° from 67.5°F | 10/100 · F |
| Precipitation balance | 9.4 in · 25.6 from 35 in | 10/100 · F |
| Frost-free season | 115 days/year | 5/100 · F |
Altamont · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Altamont'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
- 66.9°F
- Coldest month
- 17.8°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 Altamont sits across the climate record
Three NOAA fields for Altamont's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 91%
- Among 6,861 stations, Altamont sits in the cooler third of annual means.
- Annual precipitation
- Drier than 95%
- Altamont's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 78%
- Warmest-to-coldest month gap for Altamont is large versus 6,861 complete station-years.
How Altamont compares across U.S. station-mapped locations
Altamont's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
29 1st percentile score exceeds 1% 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%). This entry sits in this band.
- 30–40: 280 station-mapped locations (5%). Above this entry.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 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
Altamont's measured station temperature trend
MethodologyAcross 52 complete annual observations from 1954 to 2025, ALTAMONT warmed at a fitted rate of 0.18°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Altamont primary station fitted change +0.18 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 29°F (-2°C) | 7°F (-14°C) | 18°F (-8°C) | 0.7" | 10.8" | 31.0 | 0.0 |
| February | 35°F (2°C) | 12°F (-11°C) | 23°F (-5°C) | 0.6" | 7.5" | 27.8 | 0.0 |
| March | 47°F (8°C) | 21°F (-6°C) | 34°F (1°C) | 0.5" | 3.0" | 28.1 | 0.0 |
| April | 55°F (13°C) | 27°F (-3°C) | 41°F (5°C) | 0.8" | 3.2" | 20.6 | 0.0 |
| May | 64°F (18°C) | 36°F (2°C) | 50°F (10°C) | 1.1" | 0.1" | 7.5 | 0.0 |
| June | 75°F (24°C) | 44°F (7°C) | 60°F (15°C) | 0.8" | 0.0" | 0.8 | 1.3 |
| July | 82°F (28°C) | 52°F (11°C) | 67°F (19°C) | 0.6" | 0.0" | 0.0 | 4.9 |
| August | 80°F (27°C) | 50°F (10°C) | 65°F (18°C) | 1.0" | 0.0" | 0.0 | 1.2 |
| September | 71°F (22°C) | 41°F (5°C) | 56°F (13°C) | 1.2" | 0.1" | 2.4 | 0.0 |
| October | 57°F (14°C) | 30°F (-1°C) | 44°F (6°C) | 1.0" | 0.8" | 15.9 | 0.0 |
| November | 43°F (6°C) | 18°F (-8°C) | 31°F (-1°C) | 0.5" | 4.2" | 28.4 | 0.0 |
| December | 29°F (-1°C) | 8°F (-13°C) | 19°F (-7°C) | 0.6" | 9.0" | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around July 20, short of 90°F on every date, while 206 dates carry a normal low at or below freezing, the coldest 6°F near January 4.
The freezing stretch
The normal low stays at or below 32°F into May 2, then returns to freezing around October 10, covering 206 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 May 21, when 22% of years recorded at least a hundredth of an inch. The driest is March 11 at 14%. Summed across the calendar, that is about 62 wet dates a year.
The widest day
June 25 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Altamont.
Where Altamont Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 206 nights a year, placing this among the most frost-prone tenth of ranked stations.
Aridity defines the water calendar: about 9 inches in a normal year lands this among the driest tenth of ranked stations.
Altamont earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 10.8"
4.7 days with precipitation
Snow: 7.5"
4.9 days with precipitation
Snow: 3.0"
4.0 days with precipitation
Snow: 3.2"
5.2 days with precipitation
Snow: 0.1"
6.7 days with precipitation
4.8 days with precipitation
5.2 days with precipitation
6.6 days with precipitation
Snow: 0.1"
5.9 days with precipitation
Snow: 0.8"
5.1 days with precipitation
Snow: 4.2"
4.2 days with precipitation
Snow: 9.0"
4.6 days with precipitation
Altamont spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 20%, with neither reaching the 35% that would mark a distinct wet season. Altamont has no dry season to plan around, though it does carry a wide 49.1°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: September averages 1.2" and November 0.5". The three wettest months together take 35% 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.
Altamont is dry, and what does fall arrives gently
Only about 62 days a year record measurable precipitation here, 17% of the calendar, and they carry 9.4" between them. At roughly 0.15 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 May at about 7 wet days; the driest is March at about 4.
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.
Winter brings real snow to Altamont
Altamont averages 38.7 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 19 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 38.7 inches of depth.
- Days recording measurable snow: about 19 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 41% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 23
50% probability date
Last Spring Freeze
May 31
50% probability date
Growing Season
115 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,450
Higher = more heating needed
Cooling Degree Days
182
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside UT closest to Altamont 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 (42°F here).
- Carson, ND 42°F · 0.0°F off
- Chama, NM 42°F · 0.0°F off
- Driggs, ID 42°F · 0.0°F off
- Elk City, ID 42°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (9.4" here), excluding temperature-peer places.
- Twin Bridges, MT 9.4" · 0.0" off
- Kemmerer, WY 9.4" · 0.0" off
- Los Banos, CA 9.5" · 0.0" off
- Ontario, OR 9.5" · 0.0" off
Snow and freeze rhythm
When cold and snow define Altamont
heating led · dry · mid swing
Altamont's energy balance leans toward cold weather: 8,450 annual heating degree days against 182 for cooling. Its 49.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 115 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.
-
1. Altamont coldest normal
January
Averaging 18°F (-8°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Altamont typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Altamont snow peak
January
Altamont averages 38.7 inches of snow a year, with January the snowiest month on the normals.
Questions about Altamont's climate
How much snow does Altamont get? ▼
How cold does Altamont get in winter? ▼
How much energy does heating and cooling require in Altamont? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Altamont's primary station: ALTAMONT (USC00420074). 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 an incorporated place (GEOID 4900760). Match rule for Altamont: 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 Altamont 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.