2025 Compare Climate & Weather:
Groton, NH vs Grafton, NH

Highlights

On average, there are 199 sunny days per year in Grafton. Groton averages 194 sunny days per year. The US average is 205 sunny days.

Grafton, New Hampshire gets 47.5 inches of rain, on average, per year. Groton, New Hampshire gets 44.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Grafton averages 71.7 inches of snow per year. Groton averages 71.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Grafton, New Hampshire
Summer High: the July high is around 78.9 degrees
Winter Low: the January low is 7.2
Rain: averages 47.5 inches of rain a year
Snow: averages 71.7 inches of snow a year

Groton, New Hampshire
Summer High: the July high is around 78.7 degrees
Winter Low: the January low is 5.5
Rain: averages 44.2 inches of rain a year
Snow: averages 71.6 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Groton is 6.1 (10=best), which means it is less comfortable than most places in New Hampshire.

Today's Weather - Groton, NH

48°F

Today's Weather - Grafton, NH

48°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Groton / Grafton

July is the hottest month for Groton with an average high temperature of 78.7°, which ranks it as cooler than most places in New Hampshire. In Groton, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Groton are August, July and June.

July is the hottest month for Grafton with an average high temperature of 78.9°, which ranks it as cooler than most places in New Hampshire. In Grafton, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Grafton are August, July and June.

January has the coldest nighttime temperatures for Groton with an average of 5.5°. This is colder than most places in New Hampshire.

January has the coldest nighttime temperatures for Grafton with an average of 7.2°. This is colder than most places in New Hampshire.

In Groton, there are 2.4 days annually when the high temperature is over 90°, which is cooler than most places in New Hampshire.

In Grafton, there are 2.2 days annually when the high temperature is over 90°, which is cooler than most places in New Hampshire.

In Groton, there are 185.8 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in New Hampshire.

In Grafton, there are 179.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New Hampshire.

In Groton, there are 26.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Hampshire.

In Grafton, there are 23.3 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Hampshire.

October is the wettest month in Groton with 4.5 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 44.2 inches in Groton means that it is about average compared to other places in New Hampshire.


October is the wettest month in Grafton with 4.8 inches of rain, and the driest month is February with 3.1 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 47.5 inches in Grafton means that it is wetter than most places in New Hampshire.

June is the rainiest month in Groton with 12.8 days of rain, and February is the driest month with only 9.5 rainy days. There are 134.4 rainy days annually in Groton, which is rainier than most places in New Hampshire. The rainiest season is Autumn when it rains 26% of the time and the driest is Spring with only a 24% chance of a rainy day.

June is the rainiest month in Grafton with 12.6 days of rain, and February is the driest month with only 9.7 rainy days. There are 135.5 rainy days annually in Grafton, which is rainier than most places in New Hampshire. The rainiest season is Summer when it rains 26% of the time and the driest is Spring with only a 24% chance of a rainy day.

An annual snowfall of 71.6 inches in Groton means that it is snowier than most places in New Hampshire.

An annual snowfall of 71.7 inches in Grafton means that it is snowier than most places in New Hampshire.

January is the snowiest month in Groton with 19.6 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Grafton with 18.6 inches of snow, and 6 months of the year have significant snowfall.