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United States › Wisconsin › Walworth County › Climate Station DELAVAN WWTP, WI US Distance 6.4 mi Normals 1991–2020

30-year climate normals

Walworth County Climate and Weather Averages

Hottest month — July

82.9°

average daily high. The coldest month is January, averaging a low of 13.4°F.

Walworth County gets 36.74" of precipitation a year, and 35% 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 Precip
January 29.2° 13.4° 1.56"
February 32.6° 16.0° 1.67"
March 43.7° 24.9° 1.97"
April 57.0° 35.7° 3.66"
May 68.8° 46.9° 4.19"
June 79.0° 56.8° 4.96"
July 82.9° 60.8° 3.79"
August 81.1° 58.9° 3.87"
September 74.2° 51.2° 3.74"
October 60.8° 39.5° 2.89"
November 46.2° 28.9° 2.61"
December 34.5° 19.6° 1.83"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 35% falling in the wettest three months (May, Jun, Jul).

January 1.56"
February 1.67"
March 1.97"
April 3.66"
May 4.19"
June 4.96"
July 3.79"
August 3.87"
September 3.74"
October 2.89"
November 2.61"
December 1.83"
Annual total 36.74"

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 631
Heating degree days How much heating the climate demands 6,933
Approximate annual cooling cost At 19.74¢/kWh, Wisconsin average $125
Approximate annual electric heating cost Lower where heating is gas rather than electric $479

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 Walworth County, where electricity is one line of eight.

Common questions

What is the weather like in Walworth County?

Walworth County averages a high of 82.9°F in July and a low of 13.4°F in January. Annual precipitation is 36.74 inches, with essentially no snow.

When is the rainy season in Walworth County?

The wettest stretch is May, Jun, Jul, which accounts for 35% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Walworth County?

The average daily high in July, the hottest month, is 82.9°F. That drives 631 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Walworth County?

Effectively no. Measurable snowfall is rare in Walworth County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station DELAVAN WWTP, WI US (USC00472051), 6.4 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, Wisconsin residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.