2025 Compare Climate & Weather:
Old Saybrook, CT vs Jamestown, RI

Highlights

On average, there are 201 sunny days per year in Jamestown. Old Saybrook averages 194 sunny days per year. The US average is 205 sunny days.

Jamestown, Rhode Island gets 48.5 inches of rain, on average, per year. Old Saybrook, Connecticut gets 47.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Jamestown averages 30.4 inches of snow per year. Old Saybrook averages 25.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Jamestown, Rhode Island
Summer High: the July high is around 78.9 degrees
Winter Low: the January low is 21.8
Rain: averages 48.5 inches of rain a year
Snow: averages 30.4 inches of snow a year

Old Saybrook, Connecticut
Summer High: the July high is around 79.7 degrees
Winter Low: the January low is 22.7
Rain: averages 47.8 inches of rain a year
Snow: averages 25.9 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Jamestown is 7.0 (10=best), which means it is about average compared to other places in Rhode Island.

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

Today's Weather - Old Saybrook, CT

57°F

Today's Weather - Jamestown, RI

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Old Saybrook / Jamestown

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

July is the hottest month for Jamestown with an average high temperature of 78.9°, which ranks it as one of the coolest places in Rhode Island. In Jamestown, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jamestown are August, July and June.

January has the coldest nighttime temperatures for Old Saybrook with an average of 22.7°. This is one of the warmest places in Connecticut.

January has the coldest nighttime temperatures for Jamestown with an average of 21.8°. This is one of the warmest places in Rhode Island.

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

In Jamestown, there are 1.3 days annually when the high temperature is over 90°, which is one of the coolest places in Rhode Island.

In Old Saybrook, there are 98.6 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Connecticut.

In Jamestown, there are 105.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Rhode Island.

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

In Jamestown, there are 1.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Rhode Island.

March is the wettest month in Old Saybrook with 4.6 inches of rain, and the driest month is February with 3.4 inches. The wettest season is Summer with 26% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 47.8 inches in Old Saybrook means that it is drier than most places in Connecticut.


March is the wettest month in Jamestown with 5.1 inches of rain, and the driest month is July with 3.4 inches. The wettest season is Summer with 27% of yearly precipitation and 23% occurs in Autumn, which is the driest season. The annual rainfall of 48.5 inches in Jamestown means that it is drier than most places in Rhode Island.

May is the rainiest month in Old Saybrook with 11.0 days of rain, and August is the driest month with only 8.1 rainy days. There are 114.9 rainy days annually in Old Saybrook, 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.

May is the rainiest month in Jamestown with 12.3 days of rain, and July is the driest month with only 9.2 rainy days. There are 125.7 rainy days annually in Jamestown, which is rainier than most places in Rhode Island. 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 25.9 inches in Old Saybrook means that it is one of the least snowy places in Connecticut.

An annual snowfall of 30.4 inches in Jamestown means that it is less snowy than most places in Rhode Island.

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

February is the snowiest month in Jamestown with 8.7 inches of snow, and 6 months of the year have significant snowfall.