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United States › Iowa › Sioux County › Climate Station SIOUX CTR 2 SE, IA US Distance 2.3 mi Normals 1991–2020

30-year climate normals

Sioux County Climate and Weather Averages

Hottest month — July

84.8°

average daily high. The coldest month is January, averaging a low of 9.4°F.

Sioux County gets 29.85" of precipitation a year and 34.8" of snow, and 41% of it falls in May, Jun, Jul.

Temperature through the year

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

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 27.4° 9.4° 0.67" 6.8"
February 32.9° 13.9° 0.88" 7.7"
March 46.3° 25.2° 1.72" 5.6"
April 61.2° 36.1° 2.98" 3.1"
May 73.2° 48.4° 4.15" 0.1"
June 82.4° 58.9° 4.51" 0.0"
July 84.8° 61.8° 3.45" 0.0"
August 82.3° 59.5° 3.40" 0.0"
September 77.1° 51.2° 3.21" 0.0"
October 63.6° 38.6° 2.46" 0.9"
November 45.8° 25.4° 1.43" 3.9"
December 31.5° 14.5° 0.99" 6.7"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 41% falling in the wettest three months (May, Jun, Jul).

January 0.67"
February 0.88"
March 1.72"
April 2.98"
May 4.15"
June 4.51"
July 3.45"
August 3.40"
September 3.21"
October 2.46"
November 1.43"
December 0.99"
Annual total 29.85"

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 825
Heating degree days How much heating the climate demands 6,993
Approximate annual cooling cost At 14.14¢/kWh, Iowa average $117
Approximate annual electric heating cost Lower where heating is gas rather than electric $346

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 Sioux County, where electricity is one line of eight.

Common questions

What is the weather like in Sioux County?

Sioux County averages a high of 84.8°F in July and a low of 9.4°F in January. Annual precipitation is 29.85 inches, including 34.8 inches of snow.

When is the rainy season in Sioux County?

The wettest stretch is May, Jun, Jul, which accounts for 41% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Sioux County?

The average daily high in July, the hottest month, is 84.8°F. That drives 825 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Sioux County?

Yes. Sioux County averages 34.8 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SIOUX CTR 2 SE, IA US (USC00137700), 2.3 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, Iowa residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.