Partoun, Utah climate: Climate normals at a NOAA weather station
Partoun's normal year runs from 15°F January nights to 96°F July afternoons, with 6.8 inches of precipitation and 15 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, January lows of −9°C, July highs of 35°C, 173 mm of precipitation a year.
- NOAA stationPartoun
- Station IDUSC00426708
- Location39.63°N 113.89°W
- Elevation4,780 ft (1,457 m)
On October 23, the normal high in Partoun is 65°F and the normal low 31°F, and the chance of measurable rain or snow is 10%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Partoun.
- Jan 41° 15°
- Feb 47° 21°
- Mar 59° 28°
- Apr 66° 34°
- May 76° 42°
- Jun 87° 51°
- Jul 96° 58°
- Aug 94° 56°
- Sep 83° 46°
- Oct 69° 34°
- Nov 53° 23°
- Dec 41° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Partoun each month?
July is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 15°F. The most precipitation falls in May (1.02 in), the least in November (0.37 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 41°F | 15°F | 27.8°F | 0.52 | 3.4 | 3 | <1 | 30 | 9 h 40 min |
| February | 47°F | 21°F | 34.1°F | 0.56 | 3.8 | 4 | <1 | 26 | 10 h 40 min |
| March | 59°F | 28°F | 43.4°F | 0.53 | 0.9 | 4 | <1 | 22 | 11 h 50 min |
| April | 66°F | 34°F | 49.9°F | 0.77 | 1.5 | 5 | <1 | 13 | 13 h 10 min |
| May | 76°F | 42°F | 58.9°F | 1.02 | 0.0 | 5 | 2 | 3 | 14 h 20 min |
| June | 87°F | 51°F | 68.9°F | 0.57 | 0.0 | 3 | 13 | <1 | 15 h |
| July | 96°F | 58°F | 76.8°F | 0.47 | 0.0 | 3 | 27 | <1 | 14 h 40 min |
| August | 94°F | 56°F | 74.8°F | 0.44 | 0.0 | 3 | 24 | <1 | 13 h 50 min |
| September | 83°F | 46°F | 64.7°F | 0.57 | 0.0 | 3 | 7 | 1 | 12 h 30 min |
| October | 69°F | 34°F | 51.2°F | 0.51 | 0.2 | 3 | <1 | 13 | 11 h 10 min |
| November | 53°F | 23°F | 38.1°F | 0.37 | 1.3 | 2 | <1 | 26 | 10 h |
| December | 41°F | 15°F | 28.1°F | 0.48 | 3.7 | 3 | <1 | 30 | 9 h 20 min |
| Year (annual) | 68°F | 35°F | 51.4°F | 6.81 | 14.8 | 39 | 73 | 165 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −9°C | −2.3°C | 13 mm | 9 cm |
| February | 8°C | −6°C | 1.2°C | 14 mm | 10 cm |
| March | 15°C | −2°C | 6.3°C | 13 mm | 2 cm |
| April | 19°C | 1°C | 9.9°C | 20 mm | 4 cm |
| May | 24°C | 6°C | 14.9°C | 26 mm | 0 cm |
| June | 31°C | 10°C | 20.5°C | 14 mm | 0 cm |
| July | 35°C | 14°C | 24.9°C | 12 mm | 0 cm |
| August | 34°C | 13°C | 23.8°C | 11 mm | 0 cm |
| September | 29°C | 8°C | 18.2°C | 14 mm | 0 cm |
| October | 20°C | 1°C | 10.7°C | 13 mm | 1 cm |
| November | 12°C | −5°C | 3.4°C | 9 mm | 3 cm |
| December | 5°C | −10°C | −2.2°C | 12 mm | 9 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00426708; 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.
Which months are mildest at Partoun?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (3).
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 USC00426708.
When is the last frost at Partoun?
In Partoun, the last spring frost (32°F) comes after May 13 in half of years and after June 5 in one year in ten; the first autumn frost comes before September 29 in half of years and before September 16 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 131 year in 10 after June 5; 9 in 10 after April 28
- First autumn frost, half of years before
- September 291 year in 10 before September 16; 9 in 10 before October 11
NOAA puts the median frost-free season at 137 days, and the season without a hard freeze (28°F) at 160 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 8 in half of autumns.
By the USDA's method, the average of each year's coldest night over 1991-2020, the station is in plant hardiness zone 6a: the coldest night of a typical year reaches −8°F (28 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 USC00426708; 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 at Partoun?
In a normal year in Partoun, 73 days a year reach 90°F (10 of them 100°F or more), 165 nights fall to 32°F or colder and 39 days bring measurable precipitation.
- Days at 90°F or more
- 73a normal year
- Days at 100°F or more
- 10a normal year
- Nights at 32°F or colder
- 165a normal year
- Days that stay below freezing
- 17high of 32°F or less
- Days with 0.01 inch of precipitation
- 39a normal year
- Days with 1 inch of snow or more
- 6a normal year
The highest temperature in this station's record (since 1905) is 108°F, on June 29, 2013; the lowest is −29°F, on February 6, 1989.
The wettest calendar year on that record is 2011, with 11.23 in; the snowiest season is 1951–52, with 37.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00426708; records: ACIS (NOAA Regional Climate Centers), station USC00426708. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Partoun?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds at Partoun, 5.0 kWh per square metre a day. September is the sunniest month (89%) and December the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.4 |
| February | 74% | 3.3 |
| March | 79% | 4.8 |
| April | 81% | 6.1 |
| May | 83% | 7.1 |
| June | 89% | 8.0 |
| July | 87% | 7.4 |
| August | 88% | 6.7 |
| September | 89% | 5.7 |
| October | 85% | 4.1 |
| November | 79% | 2.8 |
| December | 71% | 2.0 |
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 many heating and cooling degree days does Partoun record?
A normal year at Partoun brings 5,885 heating degree days, 10% more than the median U.S. place (5,373), and 953 cooling degree days, 5% more 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 3,145 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,152 | 0 |
| February | 865 | 0 |
| March | 671 | 0 |
| April | 454 | 1 |
| May | 220 | 29 |
| June | 45 | 163 |
| July | 1 | 367 |
| August | 4 | 309 |
| September | 92 | 83 |
| October | 430 | 2 |
| November | 807 | 0 |
| December | 1,145 | 0 |
| Year (annual) | 5,885 | 953 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00426708. 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.
Have recent years at Partoun been warmer than normal?
2025 averaged 54.5°F, 3.1°F above the 1991-2020 normal of 51.4°F. 2 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 52.8°F | +1.4°F | 7.16 | 7.0 |
| 2022 | 50.7°F | −0.7°F | 3.25 | – |
| 2023 | 50.3°F | −1.1°F | 7.64 | 25.0 |
| 2025 | 54.5°F | +3.1°F | 4.14 | 4.0 |
Over 64 complete years from 1951 to 2025, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.21°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00426708; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Partoun's climate compare?
Partoun is warmer than 68 of the 97 places with their own NOAA record in Utah, and wetter than 4. Across the 7,247 U.S. stations with normals, its annual mean of 51.4°F is warmer than 47%.
In the Köppen classification computed from these normals, Partoun is BWk: cold desert. 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 Partoun's climate
What is the coldest month at Partoun?
January, with a normal high of 41°F and a normal low of 15°F. The warmest is July (96°F by day, 58°F at night).
Does it snow at Partoun?
Yes: 15 inches in a normal year, falling on 8 days with 0.1 inch or more, the most in February (3.8 inches).
What is the rainiest month at Partoun?
May, with 1.02 in of precipitation in a normal year; the driest is November with 0.37 in.
What plant hardiness zone is Partoun in?
By the same method at the station, the coldest night of a typical year reaches −8°F (28 years, 1991-2020): zone 6a.
How late can frost come at Partoun?
In half of years the last 32°F night comes after May 13; in one year in ten it comes after June 5. Waiting until June 5 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Callao, UT21 miles from this station, 49.3°F a year
- Ibapah, UT29 miles from this station, 48.3°F a year
- Fish Springs National Wildlife Refuge, UT30 miles from this station, 53.1°F a year
- Eskdale, UT36 miles from this station, 51.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made