30-year climate normals

Decatur County Climate and Weather Averages

Hottest month — July

90.9°

average daily high. The coldest month is January, averaging a low of 38.9°F.

Decatur County gets 49.5" of precipitation a year, and 31% of it falls in Jun, Jul, Aug.

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	61.0°	38.9°	3.83"
February	65.3°	41.9°	4.68"
March	71.9°	48.2°	5.07"
April	78.1°	53.9°	4.30"
May	85.4°	62.0°	2.43"
June	89.3°	68.8°	5.25"
July	90.9°	71.3°	4.75"
August	90.3°	71.0°	5.38"
September	87.0°	66.5°	3.67"
October	79.8°	56.1°	2.40"
November	70.2°	46.0°	3.35"
December	63.7°	41.6°	4.39"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 31% falling in the wettest three months (Jun, Jul, Aug).

January 3.83"

February 4.68"

March 5.07"

April 4.30"

May 2.43"

June 5.25"

July 4.75"

August 5.38"

September 3.67"

October 2.40"

November 3.35"

December 4.39"

Annual total 49.5"

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 2,363

Heating degree days How much heating the climate demands 1,743

Approximate annual cooling cost At 15.84¢/kWh, Georgia average $374

Approximate annual electric heating cost Lower where heating is gas rather than electric $97

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 Decatur County, where electricity is one line of eight.

Common questions

What is the weather like in Decatur County?

Decatur County averages a high of 90.9°F in July and a low of 38.9°F in January. Annual precipitation is 49.5 inches, with essentially no snow.

When is the rainy season in Decatur County?

The wettest stretch is Jun, Jul, Aug, which accounts for 31% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Decatur County?

The average daily high in July, the hottest month, is 90.9°F. That drives 2,363 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Decatur County?

Effectively no. Measurable snowfall is rare in Decatur County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station NEWTON 11 SW, GA US (USW00063829), 23 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.