30-year climate normals

Butler County Climate and Weather Averages

Hottest month — July

86.8°

average daily high. The coldest month is January, averaging a low of 21.5°F.

Butler County gets 41.42" of precipitation a year, and 32% 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	39.9°	21.5°	2.91"
February	43.7°	23.4°	2.41"
March	53.9°	31.8°	3.49"
April	66.6°	41.6°	4.63"
May	75.4°	51.8°	4.59"
June	83.2°	60.5°	4.06"
July	86.8°	64.3°	3.67"
August	85.9°	62.4°	2.95"
September	79.6°	53.8°	3.04"
October	67.7°	41.9°	3.17"
November	54.7°	31.7°	3.16"
December	43.6°	25.7°	3.34"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 32% falling in the wettest three months (Apr, May, Jun).

January 2.91"

February 2.41"

March 3.49"

April 4.63"

May 4.59"

June 4.06"

July 3.67"

August 2.95"

September 3.04"

October 3.17"

November 3.16"

December 3.34"

Annual total 41.42"

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 1,067

Heating degree days How much heating the climate demands 5,111

Approximate annual cooling cost At 19.52¢/kWh, Ohio average $208

Approximate annual electric heating cost Lower where heating is gas rather than electric $349

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 Butler County, where electricity is one line of eight.

Common questions

What is the weather like in Butler County?

Butler County averages a high of 86.8°F in July and a low of 21.5°F in January. Annual precipitation is 41.42 inches, with essentially no snow.

When is the rainy season in Butler County?

The wettest stretch is Apr, May, Jun, which accounts for 32% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Butler County?

The average daily high in July, the hottest month, is 86.8°F. That drives 1,067 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Butler County?

Effectively no. Measurable snowfall is rare in Butler County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HAMILTON BUTLER CO RGNL AP, OH US (USW00053855), 5.6 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, Ohio residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.