Climate and monthly weather forecast
Portsmouth, VA

Gold and brown trees and modern developed buildings in Downtown Portsmouth, Virginia
Gold and brown trees and modern developed buildings in Downtown Portsmouth, Virginia

Weather in January

January, the same as December, in Portsmouth, Virginia, is another chilly winter month, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 45.9°F (7.7°C). January is the coldest month, with an average high-temperature of 45.9°F (7.7°C) and an average low-temperature of 34.7°F (1.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also a frosty month in Portsmouth, Virginia, with an average temperature ranging between max 49.1°F (9.5°C) and min 37°F (2.8°C). In Portsmouth, the average high-temperature in February is relatively the same as in January - a still chilly 49.1°F (9.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Portsmouth, Virginia, with an average temperature ranging between max 54.5°F (12.5°C) and min 42.4°F (5.8°C). In March, the average high-temperature slightly increases from a frosty 49.1°F (9.5°C) in February to a fresh 54.5°F (12.5°C). Weather in March »

Weather in April

April is a comfortable spring month in Portsmouth, Virginia, with an average temperature ranging between min 52°F (11.1°C) and max 64.9°F (18.3°C). In April, the average high-temperature rises from a fresh 54.5°F (12.5°C) in March to an enjoyable 64.9°F (18.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Portsmouth, Virginia, with an average temperature fluctuating between 73.4°F (23°C) and 61.3°F (16.3°C). In May, the average high-temperature marginally rises from a comfortable 64.9°F (18.3°C) in April to a warm 73.4°F (23°C). Weather in May »

Weather in June

June, the first month of the summer in Portsmouth, is also a moderately hot month, with an average temperature ranging between min 69.6°F (20.9°C) and max 81.9°F (27.7°C). In Portsmouth, the average high-temperature in June marginally rises from 73.4°F (23°C) in May to a still warm 81.9°F (27.7°C). Weather in June »

Weather in July

July is a hot summer month in Portsmouth, Virginia, with temperature in the range of an average low of 73.6°F (23.1°C) and an average high of 86.4°F (30.2°C). With an average high-temperature of 86.4°F (30.2°C) and an average low-temperature of 73.6°F (23.1°C), July is the warmest month. The average heat index in July is evaluated at a torrid 98.6°F (37°C). Weather in July »

Weather in August

August, the last month of the summer in Portsmouth, is another warm month, with an average temperature fluctuating between 73°F (22.8°C) and 84.7°F (29.3°C). In August, the average high-temperature is practically the same as in July - a moderately hot 84.7°F (29.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Portsmouth, is still a warm month, with temperature in the range of an average low of 68.4°F (20.2°C) and an average high of 79.2°F (26.2°C). In Portsmouth, the average high-temperature in September slightly decreases from a moderately hot 84.7°F (29.3°C) in August to a still warm 79.2°F (26.2°C). Weather in September »

Weather in October

October, like September, is another pleasant autumn month in Portsmouth, Virginia, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 69.8°F (21°C). In October, the average high-temperature drops from a moderately hot 79.2°F (26.2°C) in September to a pleasant 69.8°F (21°C). Weather in October »

Weather in November

November, the last month of the autumn in Portsmouth, is another mild month, with an average temperature varying between 47.3°F (8.5°C) and 58.3°F (14.6°C). In Portsmouth, the average high-temperature in November decreases from an agreeable 69.8°F (21°C) in October to a moderate 58.3°F (14.6°C). Weather in November »

Weather in December

December, the first month of the winter in Portsmouth, is also a fresh month, with an average temperature fluctuating between 51.4°F (10.8°C) and 40.5°F (4.7°C). In December, the average high-temperature slightly decreases from a mild 58.3°F (14.6°C) in November to a fresh 51.4°F (10.8°C). Weather in December »
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FAQ

What is the coldest month in Portsmouth?

With an average high-temperature of 45.9°F (7.7°C) and an average low-temperature of 34.7°F (1.5°C), January is the coldest month.

How much does it rain in Portsmouth?

Throughout the year, in Portsmouth, there are 151.9 rainfall days, and 20.35" (517mm) of precipitation is accumulated.

When does it snow in Portsmouth?

January through March, November and December are months with snowfall in Portsmouth, Virginia.

What is the snowiest month in Portsmouth?

January is the month with the most snowfall. Snow falls for 2.2 days and accumulates 0.47" (12mm) of snow.

How many days does it snow in Portsmouth?

In Portsmouth, Virginia, during the entire year, snow falls for 5.3 days and aggregates up to 1.18" (30mm) of snow.

When is the lowest UV index in Portsmouth?

The month with the lowest UV index in Portsmouth is January, with an average maximum UV index of 2.

What is the month with the coldest ocean in Portsmouth?

With an average ocean temperature of 44.6°F (7°C), February is the month with the coldest seawater.

What is the month with the least sunshine in Portsmouth?

With an average of 5.4h of sunshine, February has the least sunshine of the year in Portsmouth, Virginia.

When is Daylight Saving Time (DST) in Portsmouth?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Portsmouth, Virginia, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Portsmouth?

April through October are months without snowfall in Portsmouth, Virginia.

What is the most humid month in Portsmouth?

The most humid month in Portsmouth is May, with an average relative humidity of 78%.

When are the longest days in Portsmouth?

With an average of 14h and 39min of daylight, June has the longest days of the year in Portsmouth.

What is the warmest month in Portsmouth?

July is the warmest month in Portsmouth, Virginia, with an average high-temperature of 86.4°F (30.2°C) and an average low-temperature of 73.6°F (23.1°C).

What is the least humid month in Portsmouth?

The months with the lowest humidity in Portsmouth are July and November, with an average relative humidity of 74%.

What month has the most sunshine in Portsmouth?

With an average of 10.9h of sunshine, July has the most sunshine of the year.

What are the months with the highest UV index in Portsmouth?

The months with the highest UV index are July and August, with an average maximum UV index of 7.

What is the wettest month in Portsmouth?

August is the month with the most rainfall in Portsmouth. Rain falls for 16.9 days and accumulates 2.52" (64mm) of precipitation.

What month is the ocean warmest in Portsmouth?

The month with the warmest seawater is August, with an average ocean temperature of 80.1°F (26.7°C).

What is the driest month in Portsmouth?

November is the month with the least rainfall in Portsmouth, Virginia. Rain falls for 8.3 days and accumulates 1.1" (28mm) of precipitation.

What is the month with the shortest days in Portsmouth?

With an average of 9h and 41min of daylight, December has the shortest days of the year in Portsmouth.

Average temperature
Portsmouth, VA

Average temperature - Portsmouth, VA

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (45.9°F).

The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).

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Average pressure
Portsmouth, VA

Average pressure - Portsmouth, VA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed
Portsmouth, VA

Average wind speed - Portsmouth, VA

The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).

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Average humidity
Portsmouth, VA

Average humidity - Portsmouth, VA

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are July and November (74%).

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Average rainfall
Portsmouth, VA

Average rainfall - Portsmouth, VA

The wettest month (with the highest rainfall) is August (2.52").
The driest month (with the least rainfall) is November (1.1").

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Average rainfall days
Portsmouth, VA

Average rainfall days - Portsmouth, VA

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (8.3 days).

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Average snowfall
Portsmouth, VA

Average snowfall - Portsmouth, VA

The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Portsmouth, VA

Average snowfall days - Portsmouth, VA

The month with the highest number of snowfall days is January (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature
Portsmouth, VA

Average sea temperature - Portsmouth, VA

The best month for swimming (with the highest average sea temperature) is August (80°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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Average daylight / Average sunshine
Portsmouth, VA

Average daylight / Average sunshine - Portsmouth, VA

The month with the longest days is June (Average daylight: 14h and 39min).
The month with the shortest days is December (Average daylight: 9h and 41min).

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).

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Average sunshine days
Portsmouth, VA

Average sunshine days - Portsmouth, VA

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is August (10.8 days).

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Average visibility
Portsmouth, VA

Average visibility - Portsmouth, VA

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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