2025 Compare Climate & Weather:
Chapin, SC vs Irmo, SC

Highlights

On average, there are 222 sunny days per year in Irmo. Chapin averages 219 sunny days per year. The US average is 205 sunny days.

Irmo, South Carolina gets 44.8 inches of rain, on average, per year. Chapin, South Carolina gets 45.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Irmo averages 0.9 inches of snow per year. Chapin averages 1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Irmo, South Carolina
Summer High: the July high is around 93 degrees
Winter Low: the January low is 30.3
Rain: averages 44.8 inches of rain a year
Snow: averages 0.9 inches of snow a year

Chapin, South Carolina
Summer High: the July high is around 91.6 degrees
Winter Low: the January low is 29.7
Rain: averages 45.1 inches of rain a year
Snow: averages 1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Chapin is 7.4 (10=best), which means it is more comfortable than most places in South Carolina.

Today's Weather - Chapin, SC

60°F

Today's Weather - Irmo, SC

61°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Chapin / Irmo

July is the hottest month for Chapin with an average high temperature of 91.6°, which ranks it as warmer than most places in South Carolina. In Chapin, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chapin are October, April and May.

July is the hottest month for Irmo with an average high temperature of 93.0°, which ranks it as one of the hottest places in South Carolina. In Irmo, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Irmo are April, October and May.

January has the coldest nighttime temperatures for Chapin with an average of 29.7°. This is colder than most places in South Carolina.

January has the coldest nighttime temperatures for Irmo with an average of 30.3°. This is colder than most places in South Carolina.

In Chapin, there are 58.4 days annually when the high temperature is over 90°, which is about average compared to other places in South Carolina.

In Irmo, there are 72.7 days annually when the high temperature is over 90°, which is one of the hottest places in South Carolina.

In Chapin, there are 70.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in South Carolina.

In Irmo, there are 68.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in South Carolina.

In Chapin, 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 Irmo, 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 Chapin with 5.2 inches of rain, and the driest month is April with 2.8 inches. The wettest season is Autumn with 30% of yearly precipitation and 22% occurs in Summer, which is the driest season. The annual rainfall of 45.1 inches in Chapin means that it is drier than most places in South Carolina.


August is the wettest month in Irmo with 5.5 inches of rain, and the driest month is April with 2.7 inches. The wettest season is Autumn with 32% of yearly precipitation and 22% occurs in Summer, which is the driest season. The annual rainfall of 44.8 inches in Irmo means that it is drier than most places in South Carolina.

January is the rainiest month in Chapin with 9.8 days of rain, and September is the driest month with only 6.8 rainy days. There are 99.1 rainy days annually in Chapin, which is less rainy than most places in South Carolina. The rainiest season is Autumn when it rains 28% of the time and the driest is Winter with only a 21% chance of a rainy day.

July is the rainiest month in Irmo with 10.2 days of rain, and September is the driest month with only 7.1 rainy days. There are 103.3 rainy days annually in Irmo, which is about average compared to other places in South Carolina. The rainiest season is Autumn when it rains 29% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 1.0 inches in Chapin means that it is snowier than most places in South Carolina.

An annual snowfall of 0.9 inches in Irmo means that it is about average compared to other places in South Carolina.

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

January is the snowiest month in Irmo with 0.6 inches of snow, and 1 month of the year have significant snowfall.