Portsmouth, Virginia 

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Climate in Portsmouth, Virginia

Portsmouth, VA has a humid subtropical climate, with warm and humid summers, and mild and wet winters. The seasonal temperatures in the city range from an average low of 34°F in winter to a high of 88°F in summer. Rainfall in Portsmouth is abundant throughout the year with an average precipitation of about 43 inches per year. Summer months bring thunderstorms with frequent lightning, while winter months tend to be cloudy and damp. Snowfall is very rare but can occur during winter months.

Portsmouth, Virginia gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Portsmouth averages 5 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 217 sunny days per year in Portsmouth. The US average is 205 sunny days.

Portsmouth gets some kind of precipitation, on average, 115 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 88 degrees
Winter Low: the January low is 33
Rain: averages 47 inches of rain a year
Snow: averages 5 inches of snow a year


The annual BestPlaces Comfort Index for Portsmouth is 7.4 (10=best), which means it is more comfortable than most places in Virginia.

6.5 / 6.7

Summer   /   Winter
May, October and September are the most pleasant months in Portsmouth, while July and January are the least comfortable months.

Climate Averages
  Portsmouth, VirginiaUnited States
  47.4 in.38.1 in.
  5.0 in.27.8 in.
  115.2 days106.2 days
  217 days205 days
  10 ft.2443 ft.


Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Portsmouth with an average high temperature of 88.3°, which ranks it as warmer than most places in Virginia. 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 May, September and June.

In Portsmouth, there are 30.1 days annually when the high temperature is over 90°, which is hotter than most places in Virginia.

January has the coldest nighttime temperatures for Portsmouth with an average of 33.4°. This is one of the warmest places in Virginia.

In Portsmouth, there are 38.8 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Virginia.

In Portsmouth, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Virginia.

Humidity in Portsmouth can be uncomfortable during the summer, but comfortable for most of the year. The most uncomfortably humid months are July, August and June. The humid season runs from June-September and the most comfortable months are October-May.

August is the wettest month in Portsmouth with 5.9 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Autumn with 32% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 47.4 inches in Portsmouth means that it is one of the wettest places in Virginia.

July is the rainiest month in Portsmouth with 11.0 days of rain, and October is the driest month with only 7.4 rainy days. There are 115.2 rainy days annually in Portsmouth, which is about average compared to other places in Virginia. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 5.0 inches in Portsmouth means that it is one of the least snowy places in Virginia. February is the snowiest month in Portsmouth with 2.1 inches of snow, and 3 months of the year have significant snowfall.

  • Annual Rainfall (US Avg: 36.5")
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    Reviews for Portsmouth    4 Reviews
    answer to question about paper mills - 4/7/2015
    I have lived in Westhaven neighborhood in Portsmouth for 23 yrs. I have never smelled a paper mill in Portsmouth. I grew up in MA about a mile from one, so I know what... Read More

    Start Your Review of Portsmouth

    location - 2/22/2010
    Housing not always... Read More

    Question: Are there any paper mills in the Portsmo - 6/13/2008
    Does anyone living near Portsmouth, VA smell a paper... Read More

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