2025 Compare Climate & Weather:
Fort Mill, SC vs Alpharetta, GA

Highlights

On average, there are 218 sunny days per year in Alpharetta. Fort Mill averages 211 sunny days per year. The US average is 205 sunny days.

Alpharetta, Georgia gets 53.4 inches of rain, on average, per year. Fort Mill, South Carolina gets 44.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Alpharetta averages 1.6 inches of snow per year. Fort Mill averages 2.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Alpharetta, Georgia
Summer High: the July high is around 87.9 degrees
Winter Low: the January low is 30
Rain: averages 53.4 inches of rain a year
Snow: averages 1.6 inches of snow a year

Fort Mill, South Carolina
Summer High: the July high is around 90.4 degrees
Winter Low: the January low is 30.8
Rain: averages 44.1 inches of rain a year
Snow: averages 2.5 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Fort Mill is 7.5 (10=best), which means it is one of the most pleasant places in South Carolina.

Today's Weather - Fort Mill, SC

58°F

Today's Weather - Alpharetta, GA

65°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Fort Mill / Alpharetta

July is the hottest month for Fort Mill with an average high temperature of 90.4°, which ranks it as cooler than most places in South Carolina. In Fort Mill, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Fort Mill are May, September and April.

July is the hottest month for Alpharetta with an average high temperature of 87.9°, which ranks it as cooler than most places in Georgia. In Alpharetta, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Alpharetta are May, September and October.

January has the coldest nighttime temperatures for Fort Mill with an average of 30.8°. This is colder than most places in South Carolina.

January has the coldest nighttime temperatures for Alpharetta with an average of 30.0°. This is colder than most places in Georgia.

In Fort Mill, there are 46.4 days annually when the high temperature is over 90°, which is cooler than most places in South Carolina.

In Alpharetta, there are 27.3 days annually when the high temperature is over 90°, which is cooler than most places in Georgia.

In Fort Mill, there are 58.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in South Carolina.

In Alpharetta, there are 64.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Georgia.

In Fort Mill, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in South Carolina.

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

August is the wettest month in Fort Mill with 4.3 inches of rain, and the driest month is May with 3.0 inches. The wettest season is Autumn with 28% of yearly precipitation and 23% occurs in Summer, which is the driest season. The annual rainfall of 44.1 inches in Fort Mill means that it is one of the driest places in South Carolina.


March is the wettest month in Alpharetta with 5.1 inches of rain, and the driest month is April with 3.8 inches. The wettest season is Spring with 27% of yearly precipitation and 23% occurs in Winter, which is the driest season. The annual rainfall of 53.4 inches in Alpharetta means that it is wetter than most places in Georgia.

March is the rainiest month in Fort Mill with 9.1 days of rain, and September is the driest month with only 6.3 rainy days. There are 98.9 rainy days annually in Fort Mill, which is less rainy than most places in South Carolina. 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.

January is the rainiest month in Alpharetta with 10.5 days of rain, and October is the driest month with only 6.8 rainy days. There are 108.0 rainy days annually in Alpharetta, which is rainier than most places in Georgia. The rainiest season is Spring when it rains 28% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 2.5 inches in Fort Mill means that it is one of the snowiest places in South Carolina.

An annual snowfall of 1.6 inches in Alpharetta means that it is snowier than most places in Georgia.

February is the snowiest month in Fort Mill with 1.0 inches of snow, and 2 months of the year have significant snowfall.

January is the snowiest month in Alpharetta with 0.7 inches of snow, and 1 month of the year have significant snowfall.