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United States › Kentucky › McLean County › Climate Station CALHOUN LOCK 2, KY US Distance 0.4 mi Normals 1991–2020

30-year climate normals

McLean County Climate and Weather Averages

Hottest month — July

87.2°

average daily high. The coldest month is January, averaging a low of 26.1°F.

McLean County gets 45.56" of precipitation a year and 4.3" of snow, and 30% of it falls in Mar, Apr, May.

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 PrecipSnow
January 42.5° 26.1° 3.26" 0.9"
February 46.7° 29.5° 3.63" 1.3"
March 57.1° 37.2° 4.38" 0.6"
April 68.2° 46.9° 4.48" 0.0"
May 76.8° 56.8° 4.59" 0.0"
June 84.3° 64.7° 4.14" 0.0"
July 87.2° 67.8° 4.16" 0.0"
August 86.5° 66.5° 2.89" 0.0"
September 81.7° 59.0° 3.13" 0.0"
October 70.3° 47.3° 3.27" 0.0"
November 56.5° 36.3° 3.37" 0.0"
December 46.0° 30.6° 4.26" 1.5"

Rainfall by month

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

January 3.26"
February 3.63"
March 4.38"
April 4.48"
May 4.59"
June 4.14"
July 4.16"
August 2.89"
September 3.13"
October 3.27"
November 3.37"
December 4.26"
Annual total 45.56"

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 1,416
Heating degree days How much heating the climate demands 4,231
Approximate annual cooling cost At 14.98¢/kWh, Kentucky average $212
Approximate annual electric heating cost Lower where heating is gas rather than electric $222

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 McLean County, where electricity is one line of eight.

Common questions

What is the weather like in McLean County?

McLean County averages a high of 87.2°F in July and a low of 26.1°F in January. Annual precipitation is 45.56 inches, including 4.3 inches of snow.

When is the rainy season in McLean County?

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

How hot does it get in McLean County?

The average daily high in July, the hottest month, is 87.2°F. That drives 1,416 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in McLean County?

Yes. McLean County averages 4.3 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CALHOUN LOCK 2, KY US (USC00151227), 0.4 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, Kentucky residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.