30-year climate normals

Lyon County Climate and Weather Averages

Hottest month — August

90.3°

average daily high. The coldest month is January, averaging a low of 29.8°F.

Lyon County gets 53.1" of precipitation a year, and 29% 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	47.7°	29.8°	4.01"
February	52.0°	33.5°	4.51"
March	61.7°	41.4°	4.42"
April	72.0°	50.1°	5.24"
May	79.3°	59.3°	4.98"
June	86.8°	67.4°	5.29"
July	90.1°	70.7°	3.99"
August	90.3°	69.9°	3.82"
September	84.8°	62.4°	3.74"
October	73.9°	51.7°	4.01"
November	61.1°	41.5°	4.19"
December	50.6°	34.2°	4.90"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Apr, May, Jun).

January 4.01"

February 4.51"

March 4.42"

April 5.24"

May 4.98"

June 5.29"

July 3.99"

August 3.82"

September 3.74"

October 4.01"

November 4.19"

December 4.90"

Annual total 53.1"

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 1,902

Heating degree days How much heating the climate demands 3,354

Approximate annual cooling cost At 14.98¢/kWh, Kentucky average $285

Approximate annual electric heating cost Lower where heating is gas rather than electric $176

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 Lyon County, where electricity is one line of eight.

Common questions

What is the weather like in Lyon County?

Lyon County averages a high of 90.3°F in August and a low of 29.8°F in January. Annual precipitation is 53.1 inches, with essentially no snow.

When is the rainy season in Lyon County?

The wettest stretch is Apr, May, Jun, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Lyon County?

The average daily high in August, the hottest month, is 90.3°F. That drives 1,902 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Lyon County?

Effectively no. Measurable snowfall is rare in Lyon County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station EDDYVILLE 5S, KY US (USC00152442), 1.8 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.