Coalville, Utah climate: Normal weather by month, frost dates and records
Coalville's normal year runs from 14°F December nights to 89°F July afternoons, with 16.4 inches of precipitation and 70 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, December lows of −10°C, July highs of 32°C, 417 mm of precipitation a year.
- NOAA stationCoalville
- Station IDUSW00024120
- Location40.91°N 111.40°W
- Elevation5,550 ft (1,692 m)
- Population1,541
On October 23, the normal high in Coalville is 63°F and the normal low 28°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Coalville.
- Jan 39° 13°
- Feb 43° 17°
- Mar 55° 24°
- Apr 62° 29°
- May 70° 35°
- Jun 81° 42°
- Jul 89° 48°
- Aug 88° 47°
- Sep 79° 38°
- Oct 66° 29°
- Nov 50° 21°
- Dec 38° 14°
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 Coalville each month?
July is the warmest month, with normal highs of 89°F; December the coldest, with normal lows of 14°F. The most precipitation falls in May (1.85 in), the least in August (0.79 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 13°F | 26.2°F | 1.49 | 14.0 | 9 | <1 | 30 | 9 h 30 min |
| February | 43°F | 17°F | 30.0°F | 1.17 | 12.9 | 9 | <1 | 27 | 10 h 40 min |
| March | 55°F | 24°F | 39.5°F | 1.51 | 9.8 | 8 | <1 | 27 | 11 h 50 min |
| April | 62°F | 29°F | 45.2°F | 1.68 | 5.2 | 9 | <1 | 21 | 13 h 20 min |
| May | 70°F | 35°F | 52.9°F | 1.85 | 0.7 | 9 | 1 | 10 | 14 h 30 min |
| June | 81°F | 42°F | 61.5°F | 1.18 | 0.1 | 7 | 4 | 2 | 15 h 10 min |
| July | 89°F | 48°F | 68.5°F | 0.94 | 0.0 | 5 | 15 | <1 | 14 h 50 min |
| August | 88°F | 47°F | 67.4°F | 0.79 | 0.0 | 7 | 11 | 1 | 13 h 50 min |
| September | 79°F | 38°F | 58.4°F | 1.31 | 0.5 | 7 | 1 | 8 | 12 h 30 min |
| October | 66°F | 29°F | 47.6°F | 1.43 | 1.9 | 8 | <1 | 22 | 11 h 10 min |
| November | 50°F | 21°F | 35.9°F | 1.43 | 9.1 | 8 | <1 | 26 | 10 h |
| December | 38°F | 14°F | 25.9°F | 1.62 | 15.9 | 8 | <1 | 30 | 9 h 20 min |
| Year (annual) | 63°F | 30°F | 46.6°F | 16.40 | 70.1 | 92 | 33 | 203 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −10°C | −3.2°C | 38 mm | 36 cm |
| February | 6°C | −8°C | −1.1°C | 30 mm | 33 cm |
| March | 13°C | −4°C | 4.2°C | 38 mm | 25 cm |
| April | 16°C | −2°C | 7.3°C | 43 mm | 13 cm |
| May | 21°C | 2°C | 11.6°C | 47 mm | 2 cm |
| June | 27°C | 6°C | 16.4°C | 30 mm | 0 cm |
| July | 32°C | 9°C | 20.3°C | 24 mm | 0 cm |
| August | 31°C | 8°C | 19.7°C | 20 mm | 0 cm |
| September | 26°C | 3°C | 14.7°C | 33 mm | 1 cm |
| October | 19°C | −2°C | 8.7°C | 36 mm | 5 cm |
| November | 10°C | −6°C | 2.2°C | 36 mm | 23 cm |
| December | 3°C | −10°C | −3.4°C | 41 mm | 40 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024120; 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 Coalville?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (7).
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 USW00024120.
When is the last frost in Coalville?
In Coalville, the last spring frost (32°F) comes after June 7 in half of years and after June 25 in one year in ten; the first autumn frost comes before September 12 in half of years and before August 28 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
- June 71 year in 10 after June 25; 9 in 10 after May 21
- First autumn frost, half of years before
- September 121 year in 10 before August 28; 9 in 10 before September 25
NOAA puts the median frost-free season at 95 days, and the season without a hard freeze (28°F) at 125 days.
A hard freeze (28°F) comes after May 21 in half of springs and before September 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Coalville in zone 6a in ZIP code 84033, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Coalville's NOAA station is in zone 5b: the coldest night of a typical year reaches −13°F (20 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00024120; 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 Coalville?
In a normal year in Coalville, 33 days a year reach 90°F (1 of them 100°F or more), 203 nights fall to 32°F or colder and 92 days bring measurable precipitation.
- Days at 90°F or more
- 33a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 203a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 92a normal year
- Days with 1 inch of snow or more
- 29a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00024120.
How sunny is Coalville?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Coalville, 4.8 kWh per square metre a day. July is the sunniest month (88%) and December the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.3 |
| February | 72% | 3.2 |
| March | 75% | 4.5 |
| April | 74% | 5.6 |
| May | 77% | 6.6 |
| June | 86% | 7.8 |
| July | 88% | 7.5 |
| August | 86% | 6.6 |
| September | 85% | 5.4 |
| October | 80% | 3.8 |
| November | 72% | 2.5 |
| December | 67% | 1.9 |
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 Coalville need?
A normal year in Coalville brings 6,959 heating degree days, 30% more than the median U.S. place (5,373), and 271 cooling degree days, 70% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,939 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,204 | 0 |
| February | 981 | 0 |
| March | 789 | 0 |
| April | 593 | 0 |
| May | 377 | 2 |
| June | 133 | 28 |
| July | 22 | 129 |
| August | 28 | 102 |
| September | 207 | 10 |
| October | 539 | 0 |
| November | 875 | 0 |
| December | 1,212 | 0 |
| Year (annual) | 6,959 | 271 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024120. 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.
How does Coalville's climate compare?
Coalville is warmer than 25 of the other 96 places with their own NOAA record in Utah, and wetter than 69. Across the 7,247 U.S. stations with normals, its annual mean of 46.6°F is warmer than 26%.
In the Köppen classification computed from these normals, Coalville is Dfb: continental, no dry season, warm summer. 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.
Which places near Coalville share this climate record?
Hoytsville has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Hoytsville, UT788 people · 3 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Coalville's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Coalville. This page uses Coalville; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Coalville (13 mi E) USC00421590 | 13 mi E | 6,510 ft | 38.1°F | 5°F | 78°F | – | – | – |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Coalville's climate
What is the coldest month in Coalville?
December, with a normal high of 38°F and a normal low of 14°F. The warmest is July (89°F by day, 48°F at night).
Does it snow in Coalville?
Yes: 70 inches in a normal year, falling on 31 days with 0.1 inch or more, the most in December (15.9 inches).
What is the rainiest month in Coalville?
May, with 1.85 in of precipitation in a normal year; the driest is August with 0.79 in.
What plant hardiness zone is Coalville in?
The USDA's 2023 map puts Coalville in zone 6a in ZIP code 84033, the nearest ZIP area. By the same method at Coalville's NOAA station, the coldest night of a typical year reaches −13°F (20 years, 1991-2020): zone 5b.
How late can frost come in Coalville?
In half of years the last 32°F night comes after June 7; in one year in ten it comes after June 25. Waiting until June 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Echo, UT4 miles from this station, 46.4°F a year
- Wanship, UT9 miles from this station, 45.2°F a year
- Morgan, UT18 miles from this station, 47.5°F a year
- Park City, UT19 miles from this station, 43.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made