2025 Compare Climate & Weather:
Portsmouth, NH vs Decatur, GA

Highlights

On average, there are 218 sunny days per year in Decatur. Portsmouth averages 198 sunny days per year. The US average is 205 sunny days.

Decatur, Georgia gets 52.5 inches of rain, on average, per year. Portsmouth, New Hampshire gets 50.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Decatur averages 1.5 inches of snow per year. Portsmouth averages 53.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Decatur, Georgia
Summer High: the July high is around 87.9 degrees
Winter Low: the January low is 32.6
Rain: averages 52.5 inches of rain a year
Snow: averages 1.5 inches of snow a year

Portsmouth, New Hampshire
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 13.8
Rain: averages 50.1 inches of rain a year
Snow: averages 53.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Decatur is 7.6 (10=best), which means it is one of the most pleasant places in Georgia.

The annual BestPlaces Comfort Index for Portsmouth is 6.8 (10=best), which means it is one of the most pleasant places in New Hampshire.

Today's Weather - Portsmouth, NH

53°F

Today's Weather - Decatur, GA

64°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Portsmouth / Decatur

July is the hottest month for Portsmouth with an average high temperature of 81.9°, which ranks it as warmer than most places in New Hampshire. In Portsmouth, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portsmouth are June, August and July.

July is the hottest month for Decatur with an average high temperature of 87.9°, which ranks it as cooler than most places in Georgia. In Decatur, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Decatur are May, September and April.

January has the coldest nighttime temperatures for Portsmouth with an average of 13.8°. This is one of the warmest places in New Hampshire.

January has the coldest nighttime temperatures for Decatur with an average of 32.6°. This is about average compared to other places in Georgia.

In Portsmouth, there are 8.0 days annually when the high temperature is over 90°, which is hotter than most places in New Hampshire.

In Decatur, there are 28.3 days annually when the high temperature is over 90°, which is cooler than most places in Georgia.

In Portsmouth, there are 149.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in New Hampshire.

In Decatur, there are 46.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Georgia.

In Portsmouth, there are 7.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in New Hampshire.

In Decatur, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Georgia.

November is the wettest month in Portsmouth with 4.8 inches of rain, and the driest month is January with 3.5 inches. The wettest season is Summer with 28% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 50.1 inches in Portsmouth means that it is one of the wettest places in New Hampshire.


July is the wettest month in Decatur with 5.1 inches of rain, and the driest month is April with 3.6 inches. The wettest season is Spring with 26% of yearly precipitation and 24% occurs in Winter, which is the driest season. The annual rainfall of 52.5 inches in Decatur means that it is wetter than most places in Georgia.

May is the rainiest month in Portsmouth with 11.4 days of rain, and February is the driest month with only 7.7 rainy days. There are 118.3 rainy days annually in Portsmouth, which is one of the least rainy places in New Hampshire. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 23% chance of a rainy day.

July is the rainiest month in Decatur with 10.8 days of rain, and October is the driest month with only 6.8 rainy days. There are 108.7 rainy days annually in Decatur, which is rainier than most places in Georgia. The rainiest season is Autumn when it rains 28% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 53.2 inches in Portsmouth means that it is one of the least snowy places in New Hampshire.

An annual snowfall of 1.5 inches in Decatur means that it is snowier than most places in Georgia.

January is the snowiest month in Portsmouth with 16.7 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Decatur with 0.6 inches of snow, and 1 month of the year have significant snowfall.