30-year climate normals

Tattnall County Climate and Weather Averages

Hottest month — July

92.3°

average daily high. The coldest month is January, averaging a low of 37.5°F.

Tattnall County gets 49.77" of precipitation a year, and 38% 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	60.6°	37.5°	3.83"
February	64.7°	40.4°	3.78"
March	71.3°	46.0°	3.86"
April	78.6°	52.4°	3.01"
May	85.2°	60.7°	3.50"
June	90.1°	68.5°	5.96"
July	92.3°	71.5°	5.32"
August	91.2°	71.0°	7.48"
September	86.6°	66.2°	3.33"
October	78.9°	55.2°	3.59"
November	69.9°	45.6°	2.55"
December	62.8°	40.1°	3.56"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 38% falling in the wettest three months (Jun, Jul, Aug).

January 3.83"

February 3.78"

March 3.86"

April 3.01"

May 3.50"

June 5.96"

July 5.32"

August 7.48"

September 3.33"

October 3.59"

November 2.55"

December 3.56"

Annual total 49.77"

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 2,351

Heating degree days How much heating the climate demands 1,910

Approximate annual cooling cost At 15.84¢/kWh, Georgia average $372

Approximate annual electric heating cost Lower where heating is gas rather than electric $106

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 Tattnall County, where electricity is one line of eight.

Common questions

What is the weather like in Tattnall County?

Tattnall County averages a high of 92.3°F in July and a low of 37.5°F in January. Annual precipitation is 49.77 inches, with essentially no snow.

When is the rainy season in Tattnall County?

The wettest stretch is Jun, Jul, Aug, which accounts for 38% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Tattnall County?

The average daily high in July, the hottest month, is 92.3°F. That drives 2,351 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Tattnall County?

Effectively no. Measurable snowfall is rare in Tattnall County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GLENNVILLE 3NW, GA US (USC00093754), 7.4 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, Georgia residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.