Gwinnett County, GA Climate

Gwinnett County, Georgia has a humid subtropical climate. It experiences hot and humid summers with temperatures reaching the low 90s. It also gets mild winters with temperatures usually staying above freezing. During the spring and fall months, Gwinnett County is known for its pleasant and comfortable weather. Precipitation is evenly distributed throughout the year, with most of it falling in the form of rain. Snow rarely falls in Gwinnett County, although it occasionally visits during winter months.

Gwinnett County, Georgia gets 53 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Gwinnett County averages 1 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 217 sunny days per year in Gwinnett County. The US average is 205 sunny days.

Gwinnett County gets some kind of precipitation, on average, 104 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 89 degrees
Winter Low: the January low is 31
Rain: averages 53 inches of rain a year
Snow: averages 1 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Gwinnett County is 7.6 (10=best), which means it is one of the most pleasant places in Georgia.

6.9 Summer - 6.7 Winter

May, October and September are the most pleasant months in Gwinnett County, while January and July are the least comfortable months.

Climate	Gwinnett, Georgia	United States
	53.0 in.	38.1 in.
	1.1 in.	27.8 in.
	104.2 days	106.2 days
	217 days	205 days
	88.5°	85.8°
	30.8°	21.7°
	7.6	7
	5	4.3
	995 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Gwinnett County with an average high temperature of 88.5°, which ranks it as cooler than most places in Georgia. In Gwinnett County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Gwinnett County are May, September and October.

In Gwinnett County, there are 33.1 days annually when the high temperature is over 90°, which is cooler than most places in Georgia.

January has the coldest nighttime temperatures for Gwinnett County with an average of 30.8°. This is colder than most places in Georgia.

In Gwinnett County, there are 59.0 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Georgia.

In Gwinnett County, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Georgia.

Humidity in Gwinnett County can be uncomfortable during the summer, but comfortable for most of the year. The most uncomfortably humid months are July, August and June. The humid season runs from June-September and the most comfortable months are October-May.

March is the wettest month in Gwinnett County with 5.1 inches of rain, and the driest month is April with 3.7 inches. The wettest season is Spring with 27% of yearly precipitation and 24% occurs in Winter, which is the driest season. The annual rainfall of 53.0 inches in Gwinnett County means that it is wetter than most places in Georgia.

July is the rainiest month in Gwinnett County with 9.9 days of rain, and October is the driest month with only 6.6 rainy days. There are 104.2 rainy days annually in Gwinnett County, which is rainier than most places in Georgia. The rainiest season is Spring when it rains 27% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 1.1 inches in Gwinnett County means that it is snowier than most places in Georgia. January is the snowiest month in Gwinnett County with 0.6 inches of snow, and 1 month of the year have significant snowfall.

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