2025 Compare Climate & Weather:
Calais, ME vs Princeton, ME

Highlights

On average, there are 159 sunny days per year in Princeton. Calais averages 161 sunny days per year. The US average is 205 sunny days.

Princeton, Maine gets 47 inches of rain, on average, per year. Calais, Maine gets 48.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Princeton averages 88.7 inches of snow per year. Calais averages 77.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Princeton, Maine
Summer High: the July high is around 78.7 degrees
Winter Low: the January low is 6.3
Rain: averages 47 inches of rain a year
Snow: averages 88.7 inches of snow a year

Calais, Maine
Summer High: the July high is around 77.1 degrees
Winter Low: the January low is 9
Rain: averages 48.3 inches of rain a year
Snow: averages 77.3 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Princeton is 6.1 (10=best), which means it is one of the least comfortable places in Maine.

The annual BestPlaces Comfort Index for Calais is 6.2 (10=best), which means it is less comfortable than most places in Maine.

Today's Weather - Calais, ME

70°F

Today's Weather - Princeton, ME

71°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Calais / Princeton

July is the hottest month for Calais with an average high temperature of 77.1°, which ranks it as cooler than most places in Maine. In Calais, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Calais are July, August and June.

July is the hottest month for Princeton with an average high temperature of 78.7°, which ranks it as about average compared to other places in Maine. In Princeton, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Princeton are August, July and June.

January has the coldest nighttime temperatures for Calais with an average of 9.0°. This is about average compared to other places in Maine.

January has the coldest nighttime temperatures for Princeton with an average of 6.3°. This is one of the coldest places in Maine.

In Calais, there are 3.4 days annually when the high temperature is over 90°, which is about average compared to other places in Maine.

In Princeton, there are 4.2 days annually when the high temperature is over 90°, which is hotter than most places in Maine.

In Calais, there are 158.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maine.

In Princeton, there are 163.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maine.

In Calais, there are 16.4 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maine.

In Princeton, there are 22.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Maine.

November is the wettest month in Calais with 5.3 inches of rain, and the driest month is July with 3.2 inches. The wettest season is Winter with 29% of yearly precipitation and 21% occurs in Autumn, which is the driest season. The annual rainfall of 48.3 inches in Calais means that it is about average compared to other places in Maine.


November is the wettest month in Princeton with 5.0 inches of rain, and the driest month is February with 3.2 inches. The wettest season is Winter with 28% of yearly precipitation and 23% occurs in Autumn, which is the driest season. The annual rainfall of 47.0 inches in Princeton means that it is drier than most places in Maine.

May is the rainiest month in Calais with 13.4 days of rain, and August is the driest month with only 9.8 rainy days. There are 138.8 rainy days annually in Calais, which is one of the rainiest places in Maine. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 24% chance of a rainy day.

May is the rainiest month in Princeton with 12.9 days of rain, and August is the driest month with only 9.4 rainy days. There are 133.8 rainy days annually in Princeton, which is rainier than most places in Maine. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 24% chance of a rainy day.

An annual snowfall of 77.3 inches in Calais means that it is snowier than most places in Maine.

An annual snowfall of 88.7 inches in Princeton means that it is one of the snowiest places in Maine.

January is the snowiest month in Calais with 21.2 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Princeton with 23.3 inches of snow, and 6 months of the year have significant snowfall.