ClimateForecastNovemberDecember >>

Cardiff Climate by Month

The climate in Cardiff is marked by big temperature swings throughout the year. Temperatures range from pleasant during the warmest months to cold in the cooler months. It also has a relatively rainy climate with high levels of precipitation. Now, let’s break down all the climate details for a clearer picture.

Average day and night temperature

In Cardiff, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a pleasant 20°C in August 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

Cardiff experiences significant rainfall throughout the year, averaging 1138 mm of precipitation annually. The wettest period in Cardiff occurs in December, which receives around 119 mm of precipitation. During the driest month, March, Cardiff experiences moderate rainfall, totaling approximately 76 mm. The consistent precipitation levels throughout the year contribute to a relatively stable climate.

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

Sunshine over the year

In Cardiff, summer days are longer and more sunny, with daily sunshine hours peaking at 6.7 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.6 hours.

Monthly hours of sunshine

Daily hours of sunshine

Average water temperature

The mean water temperature over the year in Cardiff ranges from 7°C in February to 16°C in August.

Water temperature over the year

The best time of year to visit Cardiff 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 Cardiff?
    August has an average maximum temperature of 20°C and is the warmest month of the year.
  • Which is the coldest month in Cardiff?
    The coldest month is February with an average maximum temperature of 9°C.
  • Which is the wettest month in Cardiff?
    December tops the wettest month list with 119 mm of rainfall.
  • Which is the driest month in Cardiff?
    March is the driest month with 76 mm of precipitation.
  • Which is the sunniest month in Cardiff?
    July is the sunniest month with an average of 202 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 Cardiff

    Thu   Nov 21
    4°C | 0°C
    NE 22 km/h
    2.7 mm
    broken clouds and snow

    broken clouds and snow

    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 | 4°C
    S 32 km/h
    28 mm
    overcast and heavy rain

    overcast and heavy rain