Portsmouth
Virginia, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Portsmouth, VA

A high view of gold and brown trees and modern and developed buildings in Downtown Portsmouth, Virginia, glorious cloudy sky lighting up the city
A high view of gold and brown trees and modern and developed buildings in Downtown Portsmouth, Virginia, glorious cloudy sky lighting up the city
The last month of the spring, May, is a warm month in Portsmouth, Virginia, with temperature in the range of an average low of 57.9°F (14.4°C) and an average high of 75.4°F (24.1°C).

Temperature

In May, the average high-temperature slightly increases, from an enjoyable 67.6°F (19.8°C) in April, to a warm 75.4°F (24.1°C). The average low-temperature, in May, is 57.9°F (14.4°C).

Humidity

In May, the average relative humidity is 68.8%.

Rainfall

In Portsmouth, during May, the rain falls for 10.6 days and regularly aggregates up to 3.4" (86.6mm) of precipitation. In Portsmouth, Virginia, during the entire year, the rain falls for 117 days and collects up to 46.5" (1181.9mm) of precipitation.

Snowfall

In Portsmouth, during the entire year, snow aggregates up to 5.8" (147.4mm).

Ocean temperature

In May, the average ocean temperature is 61.5°F (16.4°C). For most, swimming in 61.5°F (16.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In May, the average length of the day is 14.2h.

Sunshine

The average sunshine in May in Portsmouth is 8.8h.

What is the temperature in May in Portsmouth?

In Portsmouth, Virginia, in May, the average high-temperature is 75.4°F (24.1°C), and the average low-temperature is 57.9°F (14.4°C).

What is the average humidity in May in Portsmouth?

In May, the average relative humidity in Portsmouth is 68.8%.

How much does it rain in Portsmouth in May?

In Portsmouth, during May, the rain falls for 10.6 days and regularly aggregates up to 3.4" (86.6mm) of precipitation.

What is the ocean temperature in May in Portsmouth?

In May, the average ocean temperature in Portsmouth is 61.5°F (16.4°C). Swimming in 61.5°F (16.4°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the average length of the day in May in Portsmouth?

In May, the average length of the day in Portsmouth is 14.2h.

How many hours of sunshine does Portsmouth have in May?

The average sunshine in May is 8.8h.
Average temperature in May - Portsmouth, VA
  • Average high temperature in May: 75.4°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (48.1°F).

  • Average low temperature in May: 57.9°F

The month with the highest average low temperature is July (71.9°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).

Average humidity in May - Portsmouth, VA
  • Average humidity in May: 68.8%

The month with the highest relative humidity is August (75.2%).
The month with the lowest relative humidity is April (62.8%).

Average rainfall in May - Portsmouth, VA
  • Average rainfall in May: 3.4"

The wettest month (with the highest rainfall) is August (5.5").
The driest month (with the lowest rainfall) is February (3.1").

Average rainfall days in May - Portsmouth, VA
  • Average rainfall days in May: 10.6 days

The month with the highest number of rainy days is July (11.1 days).
The month with the lowest number of rainy days is October (7.6 days).

Average snowfall in May - Portsmouth, VA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.4").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in May - Portsmouth, VA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (1.6 days).
Months with the lowest number of snowfall days are May, June, July, August, September, October and November (0 days).

Average sea temperature in May - Portsmouth, VA
  • Average sea temperature in May: 61.6°F

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).

Average daylight in May / Average sunshine in May - Portsmouth, VA
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in May: 8.8h

The month with most sunshine is June (Average sunshine: 9.3h).
The month with least sunshine is December (Average sunshine: 5.2h).