2025 Compare Climate & Weather:
Summerville, SC vs Tonawanda, NY

Highlights

On average, there are 158 sunny days per year in Tonawanda. Summerville averages 209 sunny days per year. The US average is 205 sunny days.

Tonawanda, New York gets 36.7 inches of rain, on average, per year. Summerville, South Carolina gets 51 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Tonawanda averages 84.5 inches of snow per year. Summerville averages 0.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Tonawanda, New York
Summer High: the July high is around 81.4 degrees
Winter Low: the January low is 16.3
Rain: averages 36.7 inches of rain a year
Snow: averages 84.5 inches of snow a year

Summerville, South Carolina
Summer High: the July high is around 91.5 degrees
Winter Low: the January low is 34.6
Rain: averages 51 inches of rain a year
Snow: averages 0.7 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Tonawanda city is 6.4 (10=best), which means it is less comfortable than most places in New York.

The annual BestPlaces Comfort Index for Summerville is 7.3 (10=best), which means it is less comfortable than most places in South Carolina.

Today's Weather - Summerville, SC

86°F

Today's Weather - Tonawanda, NY

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Summerville / Tonawanda

July is the hottest month for Summerville with an average high temperature of 91.5°, which ranks it as warmer than most places in South Carolina. In Summerville, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Summerville are October, April and May.

July is the hottest month for Tonawanda city with an average high temperature of 81.4°, which ranks it as about average compared to other places in New York. In Tonawanda city, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Tonawanda city are June, August and July.

January has the coldest nighttime temperatures for Summerville with an average of 34.6°. This is warmer than most places in South Carolina.

January has the coldest nighttime temperatures for Tonawanda city with an average of 16.3°. This is about average compared to other places in New York.

In Summerville, there are 60.7 days annually when the high temperature is over 90°, which is hotter than most places in South Carolina.

In Tonawanda city, there are 3.4 days annually when the high temperature is over 90°, which is cooler than most places in New York.

In Summerville, there are 39.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Carolina.

In Tonawanda city, there are 136.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.

In Summerville, 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 Tonawanda city, there are 4.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in New York.

August is the wettest month in Summerville with 6.7 inches of rain, and the driest month is November with 2.8 inches. The wettest season is Autumn with 36% of yearly precipitation and 20% occurs in Summer, which is the driest season. The annual rainfall of 51.0 inches in Summerville means that it is wetter than most places in South Carolina.


November is the wettest month in Tonawanda city with 3.6 inches of rain, and the driest month is February with 2.2 inches. The wettest season is Winter with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 36.7 inches in Tonawanda city means that it is drier than most places in New York.

August is the rainiest month in Summerville with 12.3 days of rain, and November is the driest month with only 6.7 rainy days. There are 103.7 rainy days annually in Summerville, which is about average compared to other places in South Carolina. The rainiest season is Autumn when it rains 33% of the time and the driest is Summer with only a 21% chance of a rainy day.

January is the rainiest month in Tonawanda city with 19.2 days of rain, and August is the driest month with only 10.2 rainy days. There are 164.9 rainy days annually in Tonawanda city, which is rainier than most places in New York. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 20% chance of a rainy day.

An annual snowfall of 0.7 inches in Summerville means that it is about average compared to other places in South Carolina.

An annual snowfall of 84.5 inches in Tonawanda city means that it is snowier than most places in New York.

December is the snowiest month in Summerville with 0.3 inches of snow, and no months of the year have significant snowfall.

January is the snowiest month in Tonawanda city with 24.1 inches of snow, and 7 months of the year have significant snowfall.