Cardiff
United Kingdom
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Cardiff, United Kingdom

January, the same as December, in Cardiff, United Kingdom, is a frosty winter month, with average temperature ranging between min 2.3°C (36.1°F) and max 8.3°C (46.9°F). January is the coldest month, with an average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 2.3°C (36.1°F). Weather in January »
The last month of the winter, February, is another chilly month in Cardiff, United Kingdom, with average temperature ranging between max 8.6°C (47.5°F) and min 2.1°C (35.8°F). In Cardiff, United Kingdom, the average high-temperature in February is essentially the same as in January - a still frosty 8.6°C (47.5°F). Weather in February »

March, the first month of the spring, in Cardiff, is a cool month, with temperature in the range of an average low of 4°C (39.2°F) and an average high of 11.1°C (52°F). In March, the average high-temperature is practically the same as in February - a fresh 11.1°C (52°F). Weather in March »

April in Cardiff, United Kingdom, is a moderate spring month, with average temperature fluctuating between 5.2°C (41.4°F) and 13.8°C (56.8°F). In Cardiff, United Kingdom, the average high-temperature is essentially the same as in March - a mild 13.8°C (56.8°F). Weather in April »

May, the last month of the spring, in Cardiff, is a comfortable month, with average temperature varying between 17.1°C (62.8°F) and 8.3°C (46.9°F). In Cardiff, the average high-temperature slightly increases, from a moderate 13.8°C (56.8°F) in April, to a comfortable 17.1°C (62.8°F). Weather in May »

June, the first month of the summer, in Cardiff, is also an enjoyable month, with average temperature fluctuating between 11°C (51.8°F) and 19.8°C (67.6°F). In June, the average high-temperature is practically the same as in May - a still comfortable 19.8°C (67.6°F). Weather in June »

July is a pleasant summer month in Cardiff, United Kingdom, with temperature in the range of an average high of 21.7°C (71.1°F) and an average low of 13.1°C (55.6°F). The warmest month is July, with an average high-temperature of 21.7°C (71.1°F) and an average low-temperature of 13.1°C (55.6°F). Weather in July »

August, the last month of the summer, in Cardiff, is another pleasant month, with average temperature ranging between min 12.8°C (55°F) and max 21.5°C (70.7°F). In August, the average high-temperature is practically the same as in July - a still agreeable 21.5°C (70.7°F). Weather in August »

September, the first month of the autumn, in Cardiff, is also an enjoyable month, with temperature in the range of an average low of 10.5°C (50.9°F) and an average high of 18.8°C (65.8°F). In September, the average high-temperature is practically the same as in August - an enjoyable 18.8°C (65.8°F). Weather in September »

October, the same as September, in Cardiff, United Kingdom, is another mild autumn month, with average temperature varying between 14.9°C (58.8°F) and 7.7°C (45.9°F). In October, the average high-temperature slightly decreases, from an enjoyable 18.8°C (65.8°F) in September, to a moderate 14.9°C (58.8°F). Weather in October »

The last month of the autumn, November, is also a fresh month in Cardiff, United Kingdom, with average temperature fluctuating between 11.3°C (52.3°F) and 4.6°C (40.3°F). In November, the average high-temperature slightly decreases, from a mild 14.9°C (58.8°F) in October, to a fresh 11.3°C (52.3°F). Weather in November »

The first month of the winter, December, is also a frosty month in Cardiff, United Kingdom, with temperature in the range of an average low of 2.6°C (36.7°F) and an average high of 8.7°C (47.7°F). In Cardiff, United Kingdom, the average high-temperature is essentially the same as in November - a chilly 8.7°C (47.7°F). Weather in December »

What is the coldest month in Cardiff?

With an average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 2.3°C (36.1°F), January is the coldest month.

How many days does it rain in Cardiff?

Throughout the year, in Cardiff, there are 148.8 rainfall days, and 1152.1mm (45.4") of precipitation is accumulated.

When is the sea coldest in Cardiff?

With an average sea temperature of 8.7°C (47.7°F), March is the month with the coldest seawater in Cardiff, United Kingdom. Swimming in 8.7°C (47.7°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the driest month in Cardiff?

June is the month with the least rainfall. Rain falls for 10.1 days and accumulates 66.6mm (2.6") of precipitation.

When are the longest days in Cardiff?

June has the longest days of the year in Cardiff, with an average of 16.5h of daylight.

When is the highest UV index in Cardiff?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Cardiff.

What is the warmest month in Cardiff?

The warmest month in Cardiff is July, with an average high-temperature of 21.7°C (71.1°F) and an average low-temperature of 13.1°C (55.6°F).

What month has the most sunshine in Cardiff?

The month with the most sunshine in Cardiff, United Kingdom, is July, with an average of 6.4h of sunshine.

What are the months with the warmest sea water in Cardiff?

August and September, with an average sea temperature of 16.6°C (61.9°F), are months with the warmest seawater in Cardiff, United Kingdom. Swimming in 16.6°C (61.9°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the rainiest month in Cardiff?

The month with the most rainfall in Cardiff is October when the rain falls for 15.5 days and typically aggregates up to 133.5mm (5.3") of precipitation.

What is the month with the shortest days in Cardiff?

The month with the shortest days is December, with an average of 7.9h of daylight.

What is the month with the least sunshine in Cardiff?

The month with the least sunshine is December, with an average of 1.6h of sunshine.

When is the lowest UV index in Cardiff?

December is the month with the lowest UV index in Cardiff, with an average maximum UV index of 0.
Average temperature - Cardiff, United Kingdom
Average rainfall - Cardiff, United Kingdom

The wettest month (with the highest rainfall) is October (133.5mm).
The driest month (with the lowest rainfall) is June (66.6mm).

Average rainfall days - Cardiff, United Kingdom

The month with the highest number of rainy days is January (15.7 days).
The month with the lowest number of rainy days is June (10.1 days).

Average sea temperature - Cardiff, United Kingdom

Best months for swimming (with the highest average sea temperature) are August and September (16.6°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).

Average daylight / Average sunshine - Cardiff, United Kingdom