2025 Compare Climate & Weather:
Irmo, SC vs Wilmington, NC

Highlights

On average, there are 216 sunny days per year in Wilmington. Irmo averages 222 sunny days per year. The US average is 205 sunny days.

Wilmington, North Carolina gets 57.9 inches of rain, on average, per year. Irmo, South Carolina gets 44.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

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

Weather Highlights

Wilmington, North Carolina
Summer High: the July high is around 90.2 degrees
Winter Low: the January low is 34
Rain: averages 57.9 inches of rain a year
Snow: averages 0.9 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Wilmington is 7.3 (10=best), which means it is one of the least comfortable places in North Carolina.

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

Today's Weather - Irmo, SC

73°F

Today's Weather - Wilmington, NC

69°F

Average Monthly High / Low (°F)

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

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.

July is the hottest month for Wilmington with an average high temperature of 90.2°, which ranks it as warmer than most places in North Carolina. In Wilmington, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Wilmington are October, May and April.

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

January has the coldest nighttime temperatures for Wilmington with an average of 34.0°. This is one of the warmest places in North 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 Wilmington, there are 43.0 days annually when the high temperature is over 90°, which is hotter than most places in North 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 Wilmington, there are 41.8 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in North 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.

In Wilmington, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in North 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.


September is the wettest month in Wilmington with 7.5 inches of rain, and the driest month is April with 3.1 inches. The wettest season is Autumn with 34% of yearly precipitation and 20% occurs in Summer, which is the driest season. The annual rainfall of 57.9 inches in Wilmington means that it is one of the wettest places in North Carolina.

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.

August is the rainiest month in Wilmington with 13.6 days of rain, and April is the driest month with only 7.5 rainy days. There are 119.2 rainy days annually in Wilmington, which is rainier than most places in North Carolina. The rainiest season is Autumn when it rains 31% of the time and the driest is Summer with only a 22% chance of a rainy day.

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

An annual snowfall of 0.9 inches in Wilmington means that it is one of the least snowy places in North Carolina.

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

December is the snowiest month in Wilmington with 0.5 inches of snow, and 1 month of the year have significant snowfall.