30-year climate normals

Iron County Climate and Weather Averages

Hottest month — July

91.0°

average daily high. The coldest month is December, averaging a low of 16.3°F.

Iron County gets 11.04" of precipitation a year, and 29% of it falls in Feb, Mar, Apr.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	42.8°	18.0°	0.82"
February	47.4°	21.3°	0.98"
March	56.2°	26.8°	1.23"
April	62.6°	31.9°	1.01"
May	73.1°	39.7°	0.94"
June	84.7°	48.5°	0.48"
July	91.0°	57.1°	1.02"
August	88.5°	55.6°	0.86"
September	80.6°	45.5°	0.75"
October	67.1°	33.9°	1.23"
November	53.4°	23.6°	0.84"
December	42.1°	16.3°	0.88"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Feb, Mar, Apr).

January 0.82"

February 0.98"

March 1.23"

April 1.01"

May 0.94"

June 0.48"

July 1.02"

August 0.86"

September 0.75"

October 1.23"

November 0.84"

December 0.88"

Annual total 11.04"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 678

Heating degree days How much heating the climate demands 6,002

Approximate annual cooling cost At 12.96¢/kWh, Utah average $88

Approximate annual electric heating cost Lower where heating is gas rather than electric $272

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Iron County, where electricity is one line of eight.

Common questions

What is the weather like in Iron County?

Iron County averages a high of 91.0°F in July and a low of 16.3°F in December. Annual precipitation is 11.04 inches, with essentially no snow.

When is the rainy season in Iron County?

The wettest stretch is Feb, Mar, Apr, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Iron County?

The average daily high in July, the hottest month, is 91.0°F. That drives 678 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Iron County?

Effectively no. Measurable snowfall is rare in Iron County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CEDAR CITY MUNI AP, UT US (USW00093129), 18.1 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Utah residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.