2025 Compare Climate & Weather:
Delmar, MD vs Charleston, SC

Highlights

On average, there are 209 sunny days per year in Charleston. Delmar averages 210 sunny days per year. The US average is 205 sunny days.

Charleston, South Carolina gets 48.3 inches of rain, on average, per year. Delmar, Maryland gets 46.1 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. Delmar averages 8.4 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

Delmar, Maryland
Summer High: the July high is around 87 degrees
Winter Low: the January low is 27.4
Rain: averages 46.1 inches of rain a year
Snow: averages 8.4 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 Delmar is 7.5 (10=best), which means it is one of the most pleasant places in Maryland.

Today's Weather - Delmar, MD

64°F

Today's Weather - Charleston, SC

70°F

Average Monthly High / Low (°F)

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

July is the hottest month for Delmar with an average high temperature of 87.0°, which ranks it as about average compared to other places in Maryland. In Delmar, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Delmar are September, May and June.

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 Delmar with an average of 27.4°. This is warmer than most places in Maryland.

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 Delmar, there are 21.2 days annually when the high temperature is over 90°, which is cooler than most places in Maryland.

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 Delmar, there are 81.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Maryland.

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 Delmar, there are 0.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maryland.

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.

August is the wettest month in Delmar with 4.8 inches of rain, and the driest month is February with 3.2 inches. The wettest season is Autumn with 28% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 46.1 inches in Delmar means that it is one of the wettest places in Maryland.


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.

May is the rainiest month in Delmar with 10.8 days of rain, and September is the driest month with only 7.8 rainy days. There are 115.8 rainy days annually in Delmar, which is rainier than most places in Maryland. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% 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 8.4 inches in Delmar means that it is one of the least snowy places in Maryland.

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 Delmar with 3.2 inches of snow, and 4 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.