30-year climate normals

Lake County Climate and Weather Averages

Hottest month — July

90.1°

average daily high. The coldest month is January, averaging a low of 29.2°F.

Lake County gets 53.25" of precipitation a year, and 31% 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.

Month	Avg high	Avg low	Precip
January	47.3°	29.2°	3.80"
February	51.7°	31.8°	4.56"
March	61.1°	40.2°	5.87"
April	71.0°	49.0°	5.08"
May	79.7°	59.5°	5.38"
June	87.6°	67.7°	4.47"
July	90.1°	70.7°	4.29"
August	89.5°	68.5°	3.27"
September	83.7°	61.3°	2.64"
October	73.0°	48.8°	4.16"
November	59.5°	38.3°	4.54"
December	50.4°	32.6°	5.19"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 31% falling in the wettest three months (Mar, Apr, May).

January 3.80"

February 4.56"

March 5.87"

April 5.08"

May 5.38"

June 4.47"

July 4.29"

August 3.27"

September 2.64"

October 4.16"

November 4.54"

December 5.19"

Annual total 53.25"

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 1,830

Heating degree days How much heating the climate demands 3,585

Approximate annual cooling cost At 14.47¢/kWh, Tennessee average $265

Approximate annual electric heating cost Lower where heating is gas rather than electric $182

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 Lake County, where electricity is one line of eight.

Common questions

What is the weather like in Lake County?

Lake County averages a high of 90.1°F in July and a low of 29.2°F in January. Annual precipitation is 53.25 inches, with essentially no snow.

When is the rainy season in Lake County?

The wettest stretch is Mar, Apr, May, which accounts for 31% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Lake County?

The average daily high in July, the hottest month, is 90.1°F. That drives 1,830 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Lake County?

Effectively no. Measurable snowfall is rare in Lake County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station DYERSBURG III GOLF, TN US (USW00003809), 23.4 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, Tennessee residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.