ClimateForecastDecemberJanuary >>

Portstewart Climate by Month

The weather in Portstewart sees moderate temperature fluctuations over the course of a year. Temperatures can be mild at the high end to roughly cold at the low end. It is also known for its large amounts of rainfall. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

The weather in Portstewart changes moderately throughout the year, offering enough variation to appreciate each season. Typically, daytime temperatures range from a moderate 17°C in August to a chilly 9°C in the coolest month, February. Nights are cooler, with temperatures generally dropping to 5°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Portstewart experiences significant rainfall throughout the year, averaging 1341 mm of precipitation annually. Portstewart offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between November (145 mm) and May (79 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

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

Sunshine over the year

For those who appreciate different seasons, Portstewart serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.8 hours of sunshine daily, and embrace the darker days in December, offering only 1.3 hours of daily sunlight.

Monthly hours of sunshine

Data from: Derry, Ireland (42 KM, 26 Miles).

Daily hours of sunshine

Data from: Derry, Ireland (42 KM, 26 Miles).

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

Other facts from our historical weather data:
  • Which is the warmest month in Portstewart?
    August has an average maximum temperature of 17°C and is the warmest month of the year.
  • Which is the coldest month in Portstewart?
    The coldest month is February with an average maximum temperature of 9°C.
  • Which is the wettest month in Portstewart?
    November tops the wettest month list with 145 mm of rainfall.
  • Which is the driest month in Portstewart?
    May is the driest month with 79 mm of precipitation.
  • Which is the sunniest month in Portstewart?
    May is the sunniest month with an average of 203 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 Portstewart

    Fri   Dec 13
    7°C | 2°C
    W 18 km/h
    0.6 mm
    broken clouds and  chance of slight rain

    broken clouds and chance of slight rain

    Sat   Dec 14
    11°C | 4°C
    NW 25 km/h
    1.5 mm
    overcast and  chance of rain

    overcast and chance of rain

    Sun   Dec 15
    13°C | 10°C
    W 32 km/h
    overcast and no rain

    overcast and no rain