30-year climate normals

Green Lake County Climate and Weather Averages

Hottest month — July

81.8°

average daily high. The coldest month is January, averaging a low of 8.9°F.

Green Lake County gets 35.61" of precipitation a year, and 37% 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.

Month	Avg high	Avg low	Precip
January	25.8°	8.9°	1.38"
February	29.6°	10.4°	1.39"
March	41.9°	21.4°	2.00"
April	55.6°	32.9°	3.45"
May	68.2°	45.0°	4.29"
June	77.6°	55.4°	4.58"
July	81.8°	58.7°	4.29"
August	79.9°	56.2°	4.15"
September	72.4°	48.4°	3.27"
October	59.4°	36.9°	2.93"
November	43.9°	26.0°	2.23"
December	31.6°	15.2°	1.65"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 37% falling in the wettest three months (May, Jun, Jul).

January 1.38"

February 1.39"

March 2.00"

April 3.45"

May 4.29"

June 4.58"

July 4.29"

August 4.15"

September 3.27"

October 2.93"

November 2.23"

December 1.65"

Annual total 35.61"

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 480

Heating degree days How much heating the climate demands 7,683

Approximate annual cooling cost At 19.74¢/kWh, Wisconsin average $95

Approximate annual electric heating cost Lower where heating is gas rather than electric $531

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 Green Lake County, where electricity is one line of eight.

Common questions

What is the weather like in Green Lake County?

Green Lake County averages a high of 81.8°F in July and a low of 8.9°F in January. Annual precipitation is 35.61 inches, with essentially no snow.

When is the rainy season in Green Lake County?

The wettest stretch is May, Jun, Jul, which accounts for 37% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Green Lake County?

The average daily high in July, the hottest month, is 81.8°F. That drives 480 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Green Lake County?

Effectively no. Measurable snowfall is rare in Green Lake County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station MARKESAN, WI US (USC00475096), 5.5 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.