Circleville, Utah climate: Normal weather by month, frost dates and records
Circleville's normal year runs from 16°F December nights to 90°F July afternoons, with 9.2 inches of precipitation and 19 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.0°C, December lows of −9°C, July highs of 32°C, 234 mm of precipitation a year.
- NOAA stationCircleville
- Station IDUSC00421432
- Location38.17°N 112.28°W
- Elevation6,050 ft (1,844 m)
- From the centerunder 1 mile
- Population537
On October 23, the normal high in Circleville is 65°F and the normal low 30°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Circleville.
- Jan 45° 16°
- Feb 49° 21°
- Mar 58° 26°
- Apr 65° 32°
- May 74° 39°
- Jun 85° 47°
- Jul 90° 54°
- Aug 87° 53°
- Sep 81° 44°
- Oct 68° 33°
- Nov 55° 23°
- Dec 43° 16°
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 Circleville each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 16°F. The most precipitation falls in August (1.46 in), the least in June (0.50 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 45°F | 16°F | 30.4°F | 0.66 | 5.8 | 5 | <1 | 30 | 9 h 50 min |
| February | 49°F | 21°F | 34.7°F | 0.64 | 3.7 | 6 | <1 | 26 | 10 h 50 min |
| March | 58°F | 26°F | 41.7°F | 0.66 | 2.8 | 5 | <1 | 27 | 11 h 50 min |
| April | 65°F | 32°F | 48.2°F | 0.53 | 1.5 | 6 | <1 | 19 | 13 h 10 min |
| May | 74°F | 39°F | 56.5°F | 0.74 | 0.0 | 5 | 1 | 7 | 14 h 10 min |
| June | 85°F | 47°F | 65.7°F | 0.50 | 0.0 | 4 | 7 | 1 | 14 h 50 min |
| July | 90°F | 54°F | 72.2°F | 0.86 | 0.0 | 5 | 16 | <1 | 14 h 40 min |
| August | 87°F | 53°F | 70.2°F | 1.46 | 0.0 | 8 | 10 | <1 | 13 h 40 min |
| September | 81°F | 44°F | 62.4°F | 1.08 | 0.0 | 6 | 1 | 4 | 12 h 30 min |
| October | 68°F | 33°F | 50.2°F | 1.03 | 0.8 | 6 | <1 | 17 | 11 h 20 min |
| November | 55°F | 23°F | 38.9°F | 0.55 | 2.2 | 3 | <1 | 27 | 10 h 10 min |
| December | 43°F | 16°F | 29.4°F | 0.50 | 2.6 | 3 | <1 | 30 | 9 h 30 min |
| Year (annual) | 67°F | 34°F | 50.0°F | 9.21 | 19.4 | 62 | 35 | 186 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | −9°C | −0.9°C | 17 mm | 15 cm |
| February | 9°C | −6°C | 1.5°C | 16 mm | 9 cm |
| March | 14°C | −4°C | 5.4°C | 17 mm | 7 cm |
| April | 18°C | 0°C | 9.0°C | 13 mm | 4 cm |
| May | 23°C | 4°C | 13.6°C | 19 mm | 0 cm |
| June | 29°C | 8°C | 18.7°C | 13 mm | 0 cm |
| July | 32°C | 12°C | 22.3°C | 22 mm | 0 cm |
| August | 31°C | 12°C | 21.2°C | 37 mm | 0 cm |
| September | 27°C | 7°C | 16.9°C | 27 mm | 0 cm |
| October | 20°C | 0°C | 10.1°C | 26 mm | 2 cm |
| November | 13°C | −5°C | 3.8°C | 14 mm | 6 cm |
| December | 6°C | −9°C | −1.4°C | 13 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00421432; 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 Circleville?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, June has the fewest days with rain (4).
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 USC00421432.
When is the last frost in Circleville?
In Circleville, the last spring frost (32°F) comes after May 23 in half of years and after June 13 in one year in ten; the first autumn frost comes before September 27 in half of years and before September 12 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 231 year in 10 after June 13; 9 in 10 after May 4
- First autumn frost, half of years before
- September 271 year in 10 before September 12; 9 in 10 before October 8
NOAA puts the median frost-free season at 125 days, and the season without a hard freeze (28°F) at 149 days.
A hard freeze (28°F) comes after May 8 in half of springs and before October 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Circleville in zone 5b in ZIP code 84723.
Frost dates for every NOAA station in Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00421432; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Circleville?
In a normal year in Circleville, 35 days a year reach 90°F (1 of them 100°F or more), 186 nights fall to 32°F or colder and 62 days bring measurable precipitation.
- Days at 90°F or more
- 35a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 186a normal year
- Days that stay below freezing
- 8high of 32°F or less
- Days with 0.01 inch of precipitation
- 62a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1955) is 106°F, on July 13, 2002; the lowest is −31°F, on December 23, 1990.
The wettest calendar year on that record is 1980, with 13.26 in; the snowiest season is 1996–97, with 72.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00421432; records: ACIS (NOAA Regional Climate Centers), station USC00421432. Records use complete months only; a month missing more than three days is left out.
How sunny is Circleville?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Circleville, 5.1 kWh per square metre a day. June is the sunniest month (90%) and December the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.7 |
| February | 77% | 3.6 |
| March | 78% | 4.9 |
| April | 79% | 6.1 |
| May | 83% | 7.2 |
| June | 90% | 8.1 |
| July | 83% | 7.1 |
| August | 85% | 6.5 |
| September | 88% | 5.7 |
| October | 85% | 4.3 |
| November | 80% | 3.0 |
| December | 74% | 2.3 |
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 Circleville need?
A normal year in Circleville brings 5,964 heating degree days, 11% more than the median U.S. place (5,373), and 538 cooling degree days, 41% fewer 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 2,565 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,074 | 0 |
| February | 847 | 0 |
| March | 721 | 0 |
| April | 504 | 0 |
| May | 273 | 10 |
| June | 74 | 95 |
| July | 4 | 227 |
| August | 7 | 168 |
| September | 118 | 38 |
| October | 459 | 1 |
| November | 782 | 0 |
| December | 1,102 | 0 |
| Year (annual) | 5,964 | 538 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00421432. 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 Circleville's climate compare?
Circleville is warmer than 51 of the other 96 places with their own NOAA record in Utah, and wetter than 24. Across the 7,247 U.S. stations with normals, its annual mean of 50.0°F is warmer than 40%.
In the Köppen classification computed from these normals, Circleville is BSk: cold semi-arid steppe. 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 Circleville share this climate record?
2 places have no NOAA station with 1991-2020 normals of their 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.
- Junction, UT209 people · 5 mi NE
- Kingston, UT135 people · 6 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Circleville's climate
What is the coldest month in Circleville?
December, with a normal high of 43°F and a normal low of 16°F. The warmest is July (90°F by day, 54°F at night).
Does it snow in Circleville?
Yes: 19 inches in a normal year, falling on 10 days with 0.1 inch or more, the most in January (5.8 inches).
What is the rainiest month in Circleville?
August, with 1.46 in of precipitation in a normal year; the driest is June with 0.50 in.
What plant hardiness zone is Circleville in?
The USDA's 2023 map puts Circleville in zone 5b in ZIP code 84723.
How late can frost come in Circleville?
In half of years the last 32°F night comes after May 23; in one year in ten it comes after June 13. Waiting until June 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Beaver, UT13 miles from this station, 44.3°F a year
- Angle, UT18 miles from this station, 43.9°F a year
- Marysvale, UT19 miles from this station, 49.2°F a year
- Panguitch, UT26 miles from this station, 43.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made