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

Monthly weather forecast and climate
Cardiff, United Kingdom

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

The first month of the spring, March, is a fresh month in Cardiff, United Kingdom, with average temperature fluctuating between 11.1°C (52°F) and 4°C (39.2°F). In March, the average high-temperature is practically the same as in February - a cool 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 April, the average high-temperature is relatively the same as in March - a moderate 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 fluctuating between 8.3°C (46.9°F) and 17.1°C (62.8°F). In Cardiff, the average high-temperature in May slightly increases, from a moderate 13.8°C (56.8°F) in April, to an enjoyable 17.1°C (62.8°F). Weather in May »

June, the first month of the summer, in Cardiff, is still a comfortable month, with average temperature ranging between min 11°C (51.8°F) and max 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 in Cardiff, United Kingdom, is an agreeable summer month, with average temperature varying between 21.7°C (71.1°F) and 13.1°C (55.6°F). July is the warmest month, 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 »

The last month of the summer, August, is another pleasant month in Cardiff, United Kingdom, with average temperature ranging between min 12.8°C (55°F) and max 21.5°C (70.7°F). In Cardiff, United Kingdom, the average high-temperature is relatively 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 average temperature fluctuating between 18.8°C (65.8°F) and 10.5°C (50.9°F). In Cardiff, the average high-temperature in September is almost 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 a moderate autumn month, with average temperature varying between 14.9°C (58.8°F) and 7.7°C (45.9°F). In Cardiff, 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 temperature in the range of an average low of 4.6°C (40.3°F) and an average high of 11.3°C (52.3°F). In Cardiff, 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 »

December, the first month of the winter, in Cardiff, is still a chilly month, with average temperature ranging between max 8.7°C (47.7°F) and min 2.6°C (36.7°F). In Cardiff, the average high-temperature in December 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?

The coldest month in Cardiff, United Kingdom, is January, with an average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 2.3°C (36.1°F).

How much does it rain in Cardiff?

In Cardiff, during the entire year, the rain falls for 148.8 days and collects up to 1152.1mm (45.4") of precipitation.

When is the sea coldest in Cardiff?

The month with the coldest seawater in Cardiff is March, with an average sea temperature of 8.7°C (47.7°F).

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, with an average of 16.5h of daylight.

When is the highest UV index in Cardiff?

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

What is the warmest month in Cardiff?

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

What month has the most sunshine in Cardiff?

With an average of 6.4h of sunshine, July has the most sunshine of the year.

What months are the sea warmest in Cardiff?

Months with the warmest seawater in Cardiff, United Kingdom, are August and September, with an average sea temperature of 16.6°C (61.9°F).

What is the wettest month in Cardiff?

October is the month with the most rainfall in Cardiff. Rain falls for 15.5 days and accumulates 133.5mm (5.3") of precipitation.

What is the month with the shortest days in Cardiff?

December has the shortest days of the year, with an average of 7.9h of daylight.

What is the month with the least sunshine in Cardiff?

December has the least sunshine of the year in Cardiff, with an average of 1.6h of sunshine.

What is the month with the lowest UV index in Cardiff?

The month with the lowest UV index is December, 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