2025 Compare Climate & Weather:
Rock Hill, SC vs Johnson City, TN

Highlights

On average, there are 201 sunny days per year in Johnson City. Rock Hill averages 212 sunny days per year. The US average is 205 sunny days.

Johnson City, Tennessee gets 43.7 inches of rain, on average, per year. Rock Hill, South Carolina gets 43.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Johnson City averages 10.9 inches of snow per year. Rock Hill averages 2.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Johnson City, Tennessee
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 25.5
Rain: averages 43.7 inches of rain a year
Snow: averages 10.9 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Johnson City is 7.5 (10=best), which means it is one of the most pleasant places in Tennessee.

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.

Today's Weather - Rock Hill, SC

84°F

Today's Weather - Johnson City, TN

81°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rock Hill / Johnson City

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.

July is the hottest month for Johnson City with an average high temperature of 85.5°, which ranks it as cooler than most places in Tennessee. In Johnson City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Johnson City are September, May and June.

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

January has the coldest nighttime temperatures for Johnson City with an average of 25.5°. This is colder than most places in Tennessee.

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 Johnson City, there are 14.7 days annually when the high temperature is over 90°, which is cooler than most places in Tennessee.

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 Johnson City, there are 94.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Tennessee.

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.

In Johnson City, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Tennessee.

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.


July is the wettest month in Johnson City with 5.2 inches of rain, and the driest month is October with 2.2 inches. The wettest season is Autumn with 31% of yearly precipitation and 19% occurs in Winter, which is the driest season. The annual rainfall of 43.7 inches in Johnson City means that it is one of the driest places in Tennessee.

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.

July is the rainiest month in Johnson City with 12.9 days of rain, and October is the driest month with only 8.4 rainy days. There are 134.8 rainy days annually in Johnson City, which is one of the rainiest places in Tennessee. The rainiest season is Autumn when it rains 27% of the time and the driest is Winter with only a 20% chance of a rainy day.

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

An annual snowfall of 10.9 inches in Johnson City means that it is one of the snowiest places in Tennessee.

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

January is the snowiest month in Johnson City with 4.0 inches of snow, and 5 months of the year have significant snowfall.