Grantsville, 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 Grantsville's primary NOAA station, GRANTSVILLE 2W.
The climate verdict for Grantsville
Dryness leads the climate profile for Grantsville, Utah, with 11.6 inches of precipitation a year. NOAA records an annual average of 51°F. At 49/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 18% of scores.
- 51°F
- annual average temperature (NOAA normal)
- 49/100
- comfort score, above 18% of station-mapped location scores
- 11.6"
- annual precipitation · 33" snow
- 165 days
- frost-free growing season
Grantsville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00423348 · Grantsville, UT 51°F mean · 11.6" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #3,156
- PHOTO-FINISH ≈ Weeping Water
- PRCP-ARID 11.6"
- SWING-WIDE 50°F
- COMF-LOW 49/100
- LOAD-HEAT 6,044 HDD
- STN-1 USC00423348
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Weeping Water, NE (+ 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.
- Grantsville (this station) 51°F
- Cold Burr Oak, KS 51°F
- Hot New Boston Dam, IL 51°F
- Near Weeping Water, NE 51°F
- Near Crete, NE 51°F
Climate Living Index · Grantsville
Grantsville: 31/100 · grade F
Grantsville publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Grantsville, not an official NOAA rating. Rankings still use Comfort Score 49/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 51.2°F · 16.3° from 67.5°F | 46/100 · D |
| Frost-free season | 165 days/year | 38/100 · F |
| Snowfall burden | 33.1 inches/year | 35/100 · F |
| Normal heat + freeze calendar | 188 calendar days | 21/100 · F |
| Precipitation balance | 11.6 in · 23.4 from 35 in | 17/100 · F |
Grantsville · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Grantsville'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
- 77.9°F
- Coldest month
- 28.1°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 Grantsville sits across the climate record
Three NOAA fields for Grantsville's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 46th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 91%
- Grantsville's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 80%
- Warmest-to-coldest month gap for Grantsville is large versus 6,861 complete station-years.
How Grantsville compares across U.S. station-mapped locations
Grantsville's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 18th percentile score exceeds 18% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 0.8" | 7.2" | 29.6 | 0.0 |
| February | 43°F (6°C) | 23°F (-5°C) | 33°F (1°C) | 0.9" | 7.5" | 24.7 | 0.0 |
| March | 53°F (12°C) | 30°F (-1°C) | 42°F (5°C) | 1.1" | 3.5" | 20.6 | 0.0 |
| April | 61°F (16°C) | 36°F (2°C) | 48°F (9°C) | 1.5" | 1.9" | 9.0 | 0.0 |
| May | 71°F (22°C) | 45°F (7°C) | 58°F (14°C) | 1.5" | 0.0" | 1.3 | 1.2 |
| June | 82°F (28°C) | 54°F (12°C) | 68°F (20°C) | 0.7" | 0.0" | 0.0 | 9.3 |
| July | 92°F (33°C) | 64°F (18°C) | 78°F (26°C) | 0.7" | 0.0" | 0.0 | 24.1 |
| August | 90°F (32°C) | 62°F (17°C) | 76°F (24°C) | 0.7" | 0.0" | 0.0 | 19.7 |
| September | 79°F (26°C) | 50°F (10°C) | 64°F (18°C) | 0.9" | 0.0" | 0.2 | 3.6 |
| October | 64°F (18°C) | 38°F (3°C) | 51°F (11°C) | 0.9" | 0.1" | 6.3 | 0.0 |
| November | 49°F (10°C) | 28°F (-2°C) | 39°F (4°C) | 0.9" | 5.0" | 21.4 | 0.0 |
| December | 38°F (3°C) | 20°F (-7°C) | 29°F (-2°C) | 0.8" | 7.9" | 28.8 | 0.0 |
The year, day by day
Grantsville works both ends of the calendar. Normal highs climb to 94°F by July 27 and hold at or above 90°F on 44 dates, then normal lows drop to freezing or below on 144 dates, bottoming at 19°F around January 1.
When the heat sits
Normal highs reach 90°F from July 6 through August 18, covering 44 dates. The broader mild season, normal highs of 70°F or more, runs May 14 to October 3.
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 March 25, then returns to freezing around November 3, covering 144 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 April 12, when 28% of years recorded at least a hundredth of an inch. The driest is June 27 at 12%. Summed across the calendar, that is about 76 wet dates a year.
The widest day
August 28 carries the biggest normal gap between afternoon and dawn, 29°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Grantsville.
Where Grantsville Stands Nationally
Aridity defines the water calendar: about 12 inches in a normal year lands this among the driest tenth of ranked stations.
Grantsville earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 7.2"
7.2 days with precipitation
Snow: 7.5"
7.3 days with precipitation
Snow: 3.5"
7.8 days with precipitation
Snow: 1.9"
8.7 days with precipitation
8.2 days with precipitation
4.0 days with precipitation
3.9 days with precipitation
4.3 days with precipitation
5.0 days with precipitation
Snow: 0.1"
5.9 days with precipitation
Snow: 5.0"
6.4 days with precipitation
Snow: 7.9"
7.5 days with precipitation
Grantsville spreads its precipitation across the year
Neither half of the year dominates here: June through August take 18% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Grantsville has no dry season to plan around, though it does carry a wide 49.8°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 1.5" and July 0.7". The three wettest months together take 36% 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.
Grantsville is dry, and what does fall arrives gently
Only about 76 days a year record measurable precipitation here, 21% of the calendar, and they carry 11.6" 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 April at about 9 wet days; the driest is July 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 Grantsville
Grantsville averages 33.1 inches of snowfall a year, with December 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: 33.1 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 29% 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
October 14
50% probability date
Last Spring Freeze
May 2
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,044
Higher = more heating needed
Cooling Degree Days
1,033
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside UT closest to Grantsville 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 (51°F here).
- Bellingham, WA 51°F · 0.0°F off
- Bloomfield, IA 51°F · 0.0°F off
- Burlington, IA 51°F · 0.0°F off
- Chicago, IL 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (11.6" here), excluding temperature-peer places.
- Cody, WY 11.5" · 0.0" off
- Omak, WA 11.6" · 0.0" off
- Eagle, AK 11.5" · 0.1" off
- El Cajon, CA 11.6" · 0.1" off
Snow and freeze rhythm
When cold and snow define Grantsville
heating led · dry · mid swing
Grantsville's energy balance leans toward cold weather: 6,044 annual heating degree days against 1,033 for cooling. Its 49.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Grantsville's frost-free season lasts about 165 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Grantsville coldest normal
January
The monthly mean of 28°F (-2°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Grantsville typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Grantsville snow peak
December
Grantsville averages 33.1 inches of snow a year, with December the snowiest month on the normals.
Questions about Grantsville's climate
How much snow does Grantsville get? ▼
How many days above 90°F does Grantsville get? ▼
How much energy does heating and cooling require in Grantsville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grantsville's primary station: GRANTSVILLE 2W (USC00423348). 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 4931120). Match rule for Grantsville: 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 Grantsville 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.