2025 Compare Climate & Weather:
Columbia, MD vs Rock Hill, SC

Highlights

On average, there are 212 sunny days per year in Rock Hill. Columbia averages 212 sunny days per year. The US average is 205 sunny days.

Rock Hill, South Carolina gets 43.8 inches of rain, on average, per year. Columbia, Maryland gets 45 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rock Hill averages 2.6 inches of snow per year. Columbia averages 17.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Rock Hill, South Carolina
Summer High: the July high is around 90.8 degrees
Winter Low: the January low is 30.5
Rain: averages 43.8 inches of rain a year
Snow: averages 2.6 inches of snow a year

Columbia, Maryland
Summer High: the July high is around 87.9 degrees
Winter Low: the January low is 23.9
Rain: averages 45 inches of rain a year
Snow: averages 17.3 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Columbia is 7.3 (10=best), which means it is more comfortable than most places in Maryland.

Today's Weather - Columbia, MD

60°F

Today's Weather - Rock Hill, SC

78°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Columbia / Rock Hill

July is the hottest month for Columbia with an average high temperature of 87.9°, which ranks it as warmer than most places in Maryland. In Columbia, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Columbia are September, May and June.

July is the hottest month for Rock Hill with an average high temperature of 90.8°, which ranks it as cooler than most places in South Carolina. In Rock Hill, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rock Hill are May, April and September.

January has the coldest nighttime temperatures for Columbia with an average of 23.9°. This is colder than most places in Maryland.

January has the coldest nighttime temperatures for Rock Hill with an average of 30.5°. This is colder than most places in South Carolina.

In Columbia, there are 29.1 days annually when the high temperature is over 90°, which is hotter than most places in Maryland.

In Rock Hill, there are 49.5 days annually when the high temperature is over 90°, which is cooler than most places in South Carolina.

In Columbia, there are 99.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.

In Rock Hill, there are 59.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in South Carolina.

In Columbia, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.

In Rock Hill, 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.

May is the wettest month in Columbia with 4.4 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Summer with 27% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 45.0 inches in Columbia means that it is wetter than most places in Maryland.


August is the wettest month in Rock Hill with 4.2 inches of rain, and the driest month is May with 3.0 inches. The wettest season is Autumn with 28% of yearly precipitation and 24% occurs in Summer, which is the driest season. The annual rainfall of 43.8 inches in Rock Hill means that it is one of the driest places in South Carolina.

May is the rainiest month in Columbia with 11.6 days of rain, and October is the driest month with only 8.3 rainy days. There are 113.9 rainy days annually in Columbia, which is about average compared to other places in Maryland. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.

March is the rainiest month in Rock Hill with 9.1 days of rain, and September is the driest month with only 6.3 rainy days. There are 99.3 rainy days annually in Rock Hill, which is less rainy than most places in South Carolina. The rainiest season is Autumn 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 17.3 inches in Columbia means that it is snowier than most places in Maryland.

An annual snowfall of 2.6 inches in Rock Hill means that it is one of the snowiest places in South Carolina.

February is the snowiest month in Columbia with 6.2 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Rock Hill with 1.1 inches of snow, and 2 months of the year have significant snowfall.