Monthly weather forecast and climate
Cardiff, United Kingdom

January, the same as December, in Cardiff, United Kingdom, is another chilly winter month, with average temperature ranging between max 7.5°C (45.5°F) and min 4.1°C (39.4°F). January is the coldest month, with an average high-temperature of 7.5°C (45.5°F) and an average low-temperature of 4.1°C (39.4°F). Weather in January »

The last month of the winter, February, is also a frosty month in Cardiff, United Kingdom, with average temperature ranging between max 7.8°C (46°F) and min 3.9°C (39°F). In February, the average high-temperature is relatively the same as in January - a still chilly 7.8°C (46°F). Weather in February »

The first month of the spring, March, is also a frosty month in Cardiff, United Kingdom, with average temperature varying between 9.8°C (49.6°F) and 4.4°C (39.9°F). In Cardiff, the average high-temperature is practically the same as in February - a still frosty 9.8°C (49.6°F). Weather in March »

April in Cardiff, United Kingdom, is a fresh spring month, with average temperature varying between 5.9°C (42.6°F) and 12.3°C (54.1°F). In Cardiff, the average high-temperature in April is practically the same as in March - a fresh 12.3°C (54.1°F). Weather in April »

May, the last month of the spring, in Cardiff, is a moderate month, with average temperature fluctuating between 14.7°C (58.5°F) and 8.3°C (46.9°F). In May, the average high-temperature is relatively the same as in April - a moderate 14.7°C (58.5°F). Weather in May »

June, the first month of the summer, in Cardiff, is a comfortable month, with average temperature varying between 10.9°C (51.6°F) and 17.3°C (63.1°F). In June, the average high-temperature is relatively the same as in May - an enjoyable 17.3°C (63.1°F). Weather in June »

July, the same as June, is another enjoyable summer month in Cardiff, United Kingdom, with temperature in the range of an average low of 13°C (55.4°F) and an average high of 19°C (66.2°F). With an average high-temperature of 19°C (66.2°F) and an average low-temperature of 13°C (55.4°F), July is the warmest month. Weather in July »

The last month of the summer, August, is also an enjoyable month in Cardiff, United Kingdom, with average temperature ranging between max 18.5°C (65.3°F) and min 13.3°C (55.9°F). In Cardiff, the average high-temperature is practically the same as in July - a still enjoyable 18.5°C (65.3°F). Weather in August »

September, the first month of the autumn, in Cardiff, is also an enjoyable month, with average temperature varying between 11.4°C (52.5°F) and 17.1°C (62.8°F). In September, the average high-temperature is essentially the same as in August - a still enjoyable 17.1°C (62.8°F). Weather in September »

October, like September, is a moderate autumn month in Cardiff, United Kingdom, with temperature in the range of an average low of 9.7°C (49.5°F) and an average high of 14.1°C (57.4°F). In Cardiff, the average high-temperature in October slightly decreases, from an enjoyable 17.1°C (62.8°F) in September, to a moderate 14.1°C (57.4°F). Weather in October »

November, the last month of the autumn, in Cardiff, is another cool month, with average temperature varying between 10.4°C (50.7°F) and 6.9°C (44.4°F). In November, the average high-temperature marginally drops, from a moderate 14.1°C (57.4°F) in October, to a cool 10.4°C (50.7°F). Weather in November »

The first month of the winter, December, is also a frosty month in Cardiff, United Kingdom, with average temperature fluctuating between 8.6°C (47.5°F) and 5.2°C (41.4°F). In December, the average high-temperature is practically the same as in November - a chilly 8.6°C (47.5°F). Weather in December »

What is the coldest month in Cardiff?

January is the coldest month, with an average high-temperature of 7.5°C (45.5°F) and an average low-temperature of 4.1°C (39.4°F).

How many days does it rain in Cardiff?

Throughout the year, there are 132.6 rainfall days, and 252mm (9.92") of precipitation is accumulated.

When does it snow in Cardiff?

Months with snowfall are January, February, November and December.

How much does it snow in Cardiff?

Throughout the year, in Cardiff, there are 3.1 snowfall days, and 8mm (0.31") of snow is accumulated.

What are the months with the lowest UV index in Cardiff?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Cardiff?

February is the month with the most snowfall in Cardiff, United Kingdom. Snow falls for 1 days and accumulates 5mm (0.2") of snow.

When it does not snow in Cardiff?

In Cardiff, United Kingdom, snow does not fall in March through October.

What is the month with the coldest sea water in Cardiff?

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

What is the least humid month in Cardiff?

April and May, with an average relative humidity of 81%, are the least humid months in Cardiff, United Kingdom.

What is the driest month in Cardiff?

April is the month with the least rainfall. Rain falls for 9.1 days and accumulates 12mm (0.47") of precipitation.

What month has the most sunshine in Cardiff?

The month with the most sunshine in Cardiff, United Kingdom, is May, with an average of 8.2h of sunshine.

What are the months with the highest UV index in Cardiff?

May through September, with an average maximum UV index of 4, are months with the highest UV index.

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.

What is the warmest month in Cardiff?

July is the warmest month in Cardiff, with an average high-temperature of 19°C (66.2°F) and an average low-temperature of 13°C (55.4°F).

What is the wettest month in Cardiff?

The wettest months in Cardiff, United Kingdom, are August and November, with an average 31mm (1.22") of rainfall.

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 most humid month in Cardiff?

Months with the highest humidity in Cardiff are November and December, with an average relative humidity of 86%.

What is the month with the least sunshine in Cardiff?

With an average of 3.9h of sunshine, November has the least sunshine of the year in Cardiff, United Kingdom.

What is the month with the shortest days in Cardiff?

With an average of 7.9h of daylight, December has the shortest days of the year.
Average temperature - Cardiff, United Kingdom
Average pressure - Cardiff, United Kingdom

The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).

Average wind speed - Cardiff, United Kingdom

The windiest month (with the highest average wind speed) is February (22.3km/h).
The calmest months (with the lowest average wind speed) are June and July (15.2km/h).

Average humidity - Cardiff, United Kingdom
Average rainfall - Cardiff, United Kingdom

The wettest months (with the highest rainfall) are August and November (31mm).
The driest month (with the least rainfall) is April (12mm).

Average rainfall days - Cardiff, United Kingdom

The month with the highest number of rainy days is November (13.5 days).
Months with the least rainy days are February and April (9.1 days).

Average snowfall - Cardiff, United Kingdom

The month with the highest snowfall is February (5mm).
Months with the least snowfall are March, April, May, June, July, August, September and October (0mm).

Average snowfall days - Cardiff, United Kingdom

The month with the highest number of snowfall days is February (1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature - Cardiff, United Kingdom

The 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

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 7.9h).

The month with the most sunshine is May (Average sunshine: 8.2h).
The month with the least sunshine is November (Average sunshine: 3.9h).

Average sunshine days - Cardiff, United Kingdom

The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is November (13.7 days).

Average UV index - Cardiff, United Kingdom

Months with the highest UV index are May, June, July, August and September (UV index 4).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility - Cardiff, United Kingdom

Months with the highest visibility are February, March and December (10km).
Months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).