This weather has a price Keeping the median Allegan County home comfortable runs roughly $643 a year in heating and cooling alone. See where it lands in the monthly bill

30-year climate normals

Allegan County Climate and Weather Averages

Hottest month: July

80.0°

average daily high. The coldest month is January, averaging a low of 22.1°F.

Allegan County gets 37.22" of precipitation a year, and 30% of it falls in Apr, May, Jun.

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	33.5°	22.1°	2.71"
February	35.8°	23.9°	2.04"
March	44.8°	29.9°	2.25"
April	56.1°	39.3°	3.58"
May	67.7°	49.4°	3.91"
June	75.9°	59.6°	3.73"
July	80.0°	65.6°	3.16"
August	79.1°	64.0°	3.70"
September	73.7°	57.2°	3.19"
October	62.2°	47.5°	3.89"
November	49.2°	36.2°	2.68"
December	38.6°	27.9°	2.38"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 30% falling in the wettest three months (Apr, May, Jun).

January 2.71"

February 2.04"

March 2.25"

April 3.58"

May 3.91"

June 3.73"

July 3.16"

August 3.70"

September 3.19"

October 3.89"

November 2.68"

December 2.38"

Annual total 37.22"

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 738

Heating degree days How much heating the climate demands 5,879

Approximate annual cooling cost At 22.99¢/kWh, Michigan average $170

Approximate annual electric heating cost Lower where heating is gas rather than electric $473

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 Allegan County, where electricity is one line of eight.

Common questions

What is the weather like in Allegan County?

Allegan County averages a high of 80.0°F in July and a low of 22.1°F in January. Annual precipitation is 37.22 inches, with essentially no snow.

When is the rainy season in Allegan County?

The wettest stretch is Apr, May, Jun, which accounts for 30% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Allegan County?

The average daily high in July, the hottest month, is 80.0°F. That drives 738 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Allegan County?

The weather station used for Allegan County, S HAVEN, MI US, reports temperature and precipitation but not snowfall, so there is no snow normal to quote here. Precipitation that falls as snow is still counted in the 37.22 inches above, measured as melted water.

Sources

Temperature, precipitation and snowfall normals: NOAA National Centers for Environmental Information, 1991 to 2020 Monthly Climate Normals, station S HAVEN, MI US (USC00207690), 1.7 miles from the county centroid.
Heating and cooling degree days: NOAA, same station and period.
Annual figures on this page are the sum of that station's twelve monthly normals. NOAA also publishes a separately-computed annual normal, which can differ from the monthly sum by a few percent; we use the monthly series because the month-by-month breakdown above has to come from it.
Electricity price: US Energy Information Administration, Electric Power Monthly Table 5.6.A, Michigan residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.