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United States › Ohio › Darke County › Climate Station GREENVILLE WTP, OH US Distance 2.5 mi Normals 1991–2020

30-year climate normals

Darke County Climate and Weather Averages

Hottest month — July

84.6°

average daily high. The coldest month is January, averaging a low of 19.0°F.

Darke County gets 40.26" 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.

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 35.1° 19.0° 2.84"
February 39.1° 21.4° 2.23"
March 49.6° 30.2° 3.23"
April 62.8° 40.3° 4.18"
May 73.2° 51.7° 4.31"
June 81.6° 60.9° 4.42"
July 84.6° 63.6° 3.95"
August 83.3° 61.1° 3.40"
September 78.1° 53.4° 2.75"
October 65.6° 42.4° 2.90"
November 51.6° 32.6° 3.17"
December 39.8° 24.6° 2.88"

Rainfall by month

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

January 2.84"
February 2.23"
March 3.23"
April 4.18"
May 4.31"
June 4.42"
July 3.95"
August 3.40"
September 2.75"
October 2.90"
November 3.17"
December 2.88"
Annual total 40.26"

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 933
Heating degree days How much heating the climate demands 5,672
Approximate annual cooling cost At 19.52¢/kWh, Ohio average $182
Approximate annual electric heating cost Lower where heating is gas rather than electric $388

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 Darke County, where electricity is one line of eight.

Common questions

What is the weather like in Darke County?

Darke County averages a high of 84.6°F in July and a low of 19.0°F in January. Annual precipitation is 40.26 inches, with essentially no snow.

When is the rainy season in Darke 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 Darke County?

The average daily high in July, the hottest month, is 84.6°F. That drives 933 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Darke County?

Effectively no. Measurable snowfall is rare in Darke County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GREENVILLE WTP, OH US (USC00333375), 2.5 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, Ohio residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.