2025 Compare Climate & Weather:
Middletown, DE vs Stony Brook, NY

Highlights

On average, there are 203 sunny days per year in Stony Brook. Middletown averages 204 sunny days per year. The US average is 205 sunny days.

Stony Brook, New York gets 47.2 inches of rain, on average, per year. Middletown, Delaware gets 45.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Stony Brook averages 28.1 inches of snow per year. Middletown averages 14.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Stony Brook, New York
Summer High: the July high is around 83.2 degrees
Winter Low: the January low is 23.4
Rain: averages 47.2 inches of rain a year
Snow: averages 28.1 inches of snow a year

Middletown, Delaware
Summer High: the July high is around 86.9 degrees
Winter Low: the January low is 23.9
Rain: averages 45.1 inches of rain a year
Snow: averages 14.5 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Stony Brook is 7.2 (10=best), which means it is more comfortable than most places in New York.

The annual BestPlaces Comfort Index for Middletown is 7.3 (10=best), which means it is about average compared to other places in Delaware.

Today's Weather - Middletown, DE

61°F

Today's Weather - Stony Brook, NY

59°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Middletown / Stony Brook

July is the hottest month for Middletown with an average high temperature of 86.9°, which ranks it as warmer than most places in Delaware. In Middletown, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Middletown are September, May and June.

July is the hottest month for Stony Brook with an average high temperature of 83.2°, which ranks it as warmer than most places in New York. In Stony Brook, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Stony Brook are June, September and August.

January has the coldest nighttime temperatures for Middletown with an average of 23.9°. This is colder than most places in Delaware.

January has the coldest nighttime temperatures for Stony Brook with an average of 23.4°. This is warmer than most places in New York.

In Middletown, there are 20.8 days annually when the high temperature is over 90°, which is about average compared to other places in Delaware.

In Stony Brook, there are 7.8 days annually when the high temperature is over 90°, which is hotter than most places in New York.

In Middletown, there are 97.9 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Delaware.

In Stony Brook, there are 98.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in New York.

In Middletown, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Delaware.

In Stony Brook, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in New York.

September is the wettest month in Middletown with 4.6 inches of rain, and the driest month is February with 2.7 inches. The wettest season is Autumn with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 45.1 inches in Middletown means that it is drier than most places in Delaware.


June is the wettest month in Stony Brook with 4.5 inches of rain, and the driest month is February with 3.2 inches. The wettest season is Summer with 27% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 47.2 inches in Stony Brook means that it is wetter than most places in New York.

May is the rainiest month in Middletown with 11.1 days of rain, and October is the driest month with only 7.9 rainy days. There are 112.9 rainy days annually in Middletown, which is about average compared to other places in Delaware. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.

April is the rainiest month in Stony Brook with 10.6 days of rain, and August is the driest month with only 7.9 rainy days. There are 110.4 rainy days annually in Stony Brook, which is one of the least rainy places in New York. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 14.5 inches in Middletown means that it is snowier than most places in Delaware.

An annual snowfall of 28.1 inches in Stony Brook means that it is less snowy than most places in New York.

February is the snowiest month in Middletown with 5.8 inches of snow, and 4 months of the year have significant snowfall.

February is the snowiest month in Stony Brook with 8.2 inches of snow, and 6 months of the year have significant snowfall.