2025 Compare Climate & Weather:
Erie, PA vs Charleston, SC

Highlights

On average, there are 209 sunny days per year in Charleston. Erie averages 157 sunny days per year. The US average is 205 sunny days.

Charleston, South Carolina gets 48.3 inches of rain, on average, per year. Erie, Pennsylvania gets 44.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Charleston averages 0.4 inches of snow per year. Erie averages 101.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Charleston, South Carolina
Summer High: the July high is around 89.9 degrees
Winter Low: the January low is 39.3
Rain: averages 48.3 inches of rain a year
Snow: averages 0.4 inches of snow a year

Erie, Pennsylvania
Summer High: the July high is around 80.6 degrees
Winter Low: the January low is 19.5
Rain: averages 44.1 inches of rain a year
Snow: averages 101.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Charleston is 7.2 (10=best), which means it is less comfortable than most places in South Carolina.

The annual BestPlaces Comfort Index for Erie is 6.4 (10=best), which means it is one of the least comfortable places in Pennsylvania.

Today's Weather - Erie, PA

64°F

Today's Weather - Charleston, SC

77°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Erie / Charleston

July is the hottest month for Erie with an average high temperature of 80.6°, which ranks it as cooler than most places in Pennsylvania. In Erie, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Erie are August, June and July.

July is the hottest month for Charleston with an average high temperature of 89.9°, which ranks it as cooler than most places in South Carolina. In Charleston, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Charleston are October, May and April.

January has the coldest nighttime temperatures for Erie with an average of 19.5°. This is about average compared to other places in Pennsylvania.

January has the coldest nighttime temperatures for Charleston with an average of 39.3°. This is one of the warmest places in South Carolina.

In Erie, there are 4.1 days annually when the high temperature is over 90°, which is cooler than most places in Pennsylvania.

In Charleston, there are 41.1 days annually when the high temperature is over 90°, which is cooler than most places in South Carolina.

In Erie, there are 120.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Charleston, there are 17.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in South Carolina.

In Erie, there are 2.9 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Pennsylvania.

In Charleston, 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.

September is the wettest month in Erie with 4.7 inches of rain, and the driest month is February with 2.4 inches. The wettest season is Winter with 29% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 44.1 inches in Erie means that it is wetter than most places in Pennsylvania.


August is the wettest month in Charleston with 6.7 inches of rain, and the driest month is May with 2.5 inches. The wettest season is Autumn with 36% of yearly precipitation and 19% occurs in Summer, which is the driest season. The annual rainfall of 48.3 inches in Charleston means that it is wetter than most places in South Carolina.

January is the rainiest month in Erie with 19.5 days of rain, and July is the driest month with only 10.8 rainy days. There are 171.3 rainy days annually in Erie, which is one of the rainiest places in Pennsylvania. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 20% chance of a rainy day.

August is the rainiest month in Charleston with 11.7 days of rain, and May is the driest month with only 6.8 rainy days. There are 105.9 rainy days annually in Charleston, which is rainier than most places in South Carolina. The rainiest season is Autumn when it rains 32% of the time and the driest is Summer with only a 21% chance of a rainy day.

An annual snowfall of 101.4 inches in Erie means that it is one of the snowiest places in Pennsylvania.

An annual snowfall of 0.4 inches in Charleston means that it is less snowy than most places in South Carolina.

January is the snowiest month in Erie with 30.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Charleston with 0.2 inches of snow, and no months of the year have significant snowfall.