30-year climate normals

Henry County Climate and Weather Averages

Hottest month — July

91.8°

average daily high. The coldest month is January, averaging a low of 31.7°F.

Henry County gets 51.15" of precipitation a year, and 30% of it falls in Jan, Feb, Mar.

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	55.0°	31.7°	5.30"
February	58.8°	33.5°	4.47"
March	67.0°	40.3°	5.44"
April	75.6°	47.3°	3.82"
May	83.1°	56.4°	3.31"
June	89.0°	65.4°	4.32"
July	91.8°	69.1°	4.43"
August	90.9°	68.4°	4.56"
September	85.2°	61.7°	3.73"
October	74.7°	49.6°	3.45"
November	64.2°	38.8°	3.65"
December	56.2°	34.2°	4.67"

Rainfall by month

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

January 5.30"

February 4.47"

March 5.44"

April 3.82"

May 3.31"

June 4.32"

July 4.43"

August 4.56"

September 3.73"

October 3.45"

November 3.65"

December 4.67"

Annual total 51.15"

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 1,844

Heating degree days How much heating the climate demands 2,908

Approximate annual cooling cost At 15.84¢/kWh, Georgia average $292

Approximate annual electric heating cost Lower where heating is gas rather than electric $161

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 Henry County, where electricity is one line of eight.

Common questions

What is the weather like in Henry County?

Henry County averages a high of 91.8°F in July and a low of 31.7°F in January. Annual precipitation is 51.15 inches, with essentially no snow.

When is the rainy season in Henry County?

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

How hot does it get in Henry County?

The average daily high in July, the hottest month, is 91.8°F. That drives 1,844 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Henry County?

Effectively no. Measurable snowfall is rare in Henry County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station MCDONOUGH 5 ENE, GA US (USC00095666), 7.1 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, Georgia residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.