30-year climate normals

Hancock County Climate and Weather Averages

Hottest month — July

82.4°

average daily high. The coldest month is January, averaging a low of 6.3°F.

Hancock County gets 34.3" of precipitation a year, 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.

Month	Avg high	Avg low	Precip
January	23.7°	6.3°	0.77"
February	27.9°	10.3°	1.48"
March	41.1°	22.7°	2.14"
April	56.5°	34.3°	3.88"
May	69.1°	47.6°	4.48"
June	79.3°	58.4°	5.41"
July	82.4°	62.0°	4.24"
August	79.5°	59.2°	3.57"
September	73.4°	50.3°	3.21"
October	59.7°	37.4°	2.56"
November	43.2°	24.7°	1.43"
December	29.8°	12.9°	1.13"

Rainfall by month

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

January 0.77"

February 1.48"

March 2.14"

April 3.88"

May 4.48"

June 5.41"

July 4.24"

August 3.57"

September 3.21"

October 2.56"

November 1.43"

December 1.13"

Annual total 34.3"

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 650

Heating degree days How much heating the climate demands 7,722

Approximate annual cooling cost At 14.14¢/kWh, Iowa average $92

Approximate annual electric heating cost Lower where heating is gas rather than electric $382

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 Hancock County, where electricity is one line of eight.

Common questions

What is the weather like in Hancock County?

Hancock County averages a high of 82.4°F in July and a low of 6.3°F in January. Annual precipitation is 34.3 inches, with essentially no snow.

When is the rainy season in Hancock 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 Hancock County?

The average daily high in July, the hottest month, is 82.4°F. That drives 650 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Hancock County?

Effectively no. Measurable snowfall is rare in Hancock County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station BRITT 3E, IA US (USC00130923), 2.1 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, Iowa residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.