ClimateForecastNovemberDecember >>

Portsmouth Climate by Month

The temperature in Portsmouth can vary greatly throughout the year. The temperatures shift from pleasant to cold. It receives a moderate amount of precipitation. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

Depending on the time of the year, temperatures range from pleasant to chilly in Portsmouth. On average, daytime temperatures range from a pleasant 21°C in July to a chilly 9°C in February. Nighttime temperatures can drop, with averages reaching 4°C in February.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Generally, Portsmouth has a moderate amount of precipitation, averaging 844 mm of rainfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, November, sees around 94 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, March, still receives a respectable 54 mm of rainfall.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

In Portsmouth, summer days are longer and more sunny, with daily sunshine hours peaking at 7.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.8 hours.

Monthly hours of sunshine

Data from: Southampton, the United Kingdom (25 KM, 15 Miles).

Daily hours of sunshine

Data from: Southampton, the United Kingdom (25 KM, 15 Miles).

The best time of year to visit Portsmouth in the United Kingdom

During the months of July and August you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Portsmouth?
    July has an average maximum temperature of 21°C and is the warmest month of the year.
  • Which is the coldest month in Portsmouth?
    The coldest month is February with an average maximum temperature of 9°C.
  • Which is the wettest month in Portsmouth?
    November tops the wettest month list with 94 mm of rainfall.
  • Which is the driest month in Portsmouth?
    March is the driest month with 54 mm of precipitation.
  • Which is the sunniest month in Portsmouth?
    July is the sunniest month with an average of 222 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Portsmouth

    Thu   Nov 21
    4°C | 0°C
    NE 18 km/h
    8.9 mm
    broken clouds and sleet

    broken clouds and sleet

    Fri   Nov 22
    7°C | 1°C
    W 22 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Sat   Nov 23
    14°C | 2°C
    S 43 km/h
    19 mm
    overcast and heavy rain

    overcast and heavy rain