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United States › Ohio › Hamilton County › Climate Station CINCINNATI LUNKEN AP, OH US Distance 9.3 mi Normals 1991–2020

30-year climate normals

Hamilton County Climate and Weather Averages

Hottest month — July

86.6°

average daily high. The coldest month is January, averaging a low of 23.6°F.

Hamilton County gets 43.4" of precipitation a year, and 32% 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.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 40.6° 23.6° 2.86"
February 45.0° 25.7° 2.79"
March 54.6° 33.4° 3.94"
April 66.6° 42.5° 4.37"
May 75.4° 52.7° 4.70"
June 83.3° 61.2° 4.61"
July 86.6° 65.3° 4.39"
August 85.9° 63.7° 3.39"
September 79.7° 55.9° 3.07"
October 67.9° 44.2° 3.05"
November 55.1° 34.1° 2.91"
December 44.6° 28.0° 3.32"

Rainfall by month

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

January 2.86"
February 2.79"
March 3.94"
April 4.37"
May 4.70"
June 4.61"
July 4.39"
August 3.39"
September 3.07"
October 3.05"
November 2.91"
December 3.32"
Annual total 43.4"

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 1,126
Heating degree days How much heating the climate demands 4,804
Approximate annual cooling cost At 19.52¢/kWh, Ohio average $220
Approximate annual electric heating cost Lower where heating is gas rather than electric $328

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 Hamilton County, where electricity is one line of eight.

Common questions

What is the weather like in Hamilton County?

Hamilton County averages a high of 86.6°F in July and a low of 23.6°F in January. Annual precipitation is 43.4 inches, with essentially no snow.

When is the rainy season in Hamilton County?

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

How hot does it get in Hamilton County?

The average daily high in July, the hottest month, is 86.6°F. That drives 1,126 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Hamilton County?

Effectively no. Measurable snowfall is rare in Hamilton County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CINCINNATI LUNKEN AP, OH US (USW00093812), 9.3 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.