2025 Compare Climate & Weather:
Chapel Hill, NC vs Old Lyme, CT

Highlights

On average, there are 194 sunny days per year in Old Lyme. Chapel Hill averages 216 sunny days per year. The US average is 205 sunny days.

Old Lyme, Connecticut gets 47.8 inches of rain, on average, per year. Chapel Hill, North Carolina gets 46.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Old Lyme averages 25.9 inches of snow per year. Chapel Hill averages 3.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Old Lyme, Connecticut
Summer High: the July high is around 79.7 degrees
Winter Low: the January low is 22.6
Rain: averages 47.8 inches of rain a year
Snow: averages 25.9 inches of snow a year

Chapel Hill, North Carolina
Summer High: the July high is around 88.8 degrees
Winter Low: the January low is 29.3
Rain: averages 46.3 inches of rain a year
Snow: averages 3.8 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Old Lyme is 7.2 (10=best), which means it is one of the most pleasant places in Connecticut.

The annual BestPlaces Comfort Index for Chapel Hill is 7.5 (10=best), which means it is more comfortable than most places in North Carolina.

Today's Weather - Chapel Hill, NC

65°F

Today's Weather - Old Lyme, CT

58°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Chapel Hill / Old Lyme

July is the hottest month for Chapel Hill with an average high temperature of 88.8°, which ranks it as cooler than most places in North Carolina. In Chapel Hill, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chapel Hill are May, September and October.

July is the hottest month for Old Lyme with an average high temperature of 79.7°, which ranks it as cooler than most places in Connecticut. In Old Lyme, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Old Lyme are August, July and June.

January has the coldest nighttime temperatures for Chapel Hill with an average of 29.3°. This is about average compared to other places in North Carolina.

January has the coldest nighttime temperatures for Old Lyme with an average of 22.6°. This is one of the warmest places in Connecticut.

In Chapel Hill, there are 36.9 days annually when the high temperature is over 90°, which is about average compared to other places in North Carolina.

In Old Lyme, there are 1.8 days annually when the high temperature is over 90°, which is cooler than most places in Connecticut.

In Chapel Hill, there are 70.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in North Carolina.

In Old Lyme, there are 99.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Connecticut.

In Chapel Hill, 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.

In Old Lyme, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Connecticut.

August is the wettest month in Chapel Hill with 4.6 inches of rain, and the driest month is April with 3.3 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 46.3 inches in Chapel Hill means that it is drier than most places in North Carolina.


March is the wettest month in Old Lyme with 4.6 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Summer with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 47.8 inches in Old Lyme means that it is drier than most places in Connecticut.

July is the rainiest month in Chapel Hill with 10.9 days of rain, and October is the driest month with only 7.6 rainy days. There are 113.5 rainy days annually in Chapel Hill, which is rainier than most places in North 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.

May is the rainiest month in Old Lyme with 11.3 days of rain, and August is the driest month with only 8.6 rainy days. There are 117.8 rainy days annually in Old Lyme, which is less rainy than most places in Connecticut. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 23% chance of a rainy day.

An annual snowfall of 3.8 inches in Chapel Hill means that it is snowier than most places in North Carolina.

An annual snowfall of 25.9 inches in Old Lyme means that it is one of the least snowy places in Connecticut.

January is the snowiest month in Chapel Hill with 1.9 inches of snow, and 2 months of the year have significant snowfall.

February is the snowiest month in Old Lyme with 7.9 inches of snow, and 6 months of the year have significant snowfall.