30-year climate normals

Glynn County Climate and Weather Averages

Hottest month — July

90.3°

average daily high. The coldest month is January, averaging a low of 44.0°F.

Glynn County gets 50.29" of precipitation a year, and 36% 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°	44.0°	3.54"
February	64.3°	47.0°	3.06"
March	70.1°	52.6°	3.80"
April	76.3°	59.2°	3.07"
May	83.0°	67.1°	3.04"
June	87.5°	72.9°	6.35"
July	90.3°	75.3°	4.94"
August	88.8°	75.1°	6.95"
September	84.3°	72.0°	6.26"
October	77.5°	63.1°	4.60"
November	69.2°	52.9°	2.03"
December	63.3°	46.9°	2.65"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 36% falling in the wettest three months (Jun, Jul, Aug).

January 3.54"

February 3.06"

March 3.80"

April 3.07"

May 3.04"

June 6.35"

July 4.94"

August 6.95"

September 6.26"

October 4.60"

November 2.03"

December 2.65"

Annual total 50.29"

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 2,698

Heating degree days How much heating the climate demands 1,400

Approximate annual cooling cost At 15.84¢/kWh, Georgia average $427

Approximate annual electric heating cost Lower where heating is gas rather than electric $78

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 Glynn County, where electricity is one line of eight.

Common questions

What is the weather like in Glynn County?

Glynn County averages a high of 90.3°F in July and a low of 44.0°F in January. Annual precipitation is 50.29 inches, with essentially no snow.

When is the rainy season in Glynn County?

The wettest stretch is Jun, Jul, Aug, which accounts for 36% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Glynn County?

The average daily high in July, the hottest month, is 90.3°F. That drives 2,698 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Glynn County?

Effectively no. Measurable snowfall is rare in Glynn County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station BRUNSWICK, GA US (USC00091340), 3.1 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.