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

July weather forecast and climate
Cardiff, United Kingdom

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).

Temperature

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).

Rainfall

In Cardiff, during July, the rain falls for 10.7 days and regularly aggregates up to 78.4mm (3.1") of precipitation. In Cardiff, during the entire year, the rain falls for 148.8 days and collects up to 1152.1mm (45.4") of precipitation.

Sea temperature

In Cardiff, the average water temperature is 15.7°C (60.3°F).
Note: For most, swimming in 15.7°C (60.3°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Cardiff, the average length of the day is 16.1h.

Sunshine

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

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

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.

What is the temperature in July in Cardiff?

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

How much does it rain in Cardiff in July?

In July, in Cardiff, United Kingdom, the rain falls for 10.7 days. Throughout July, 78.4mm (3.1") of precipitation is accumulated.

What is the sea water temperature in July in Cardiff?

In July, the average sea temperature in Cardiff, United Kingdom, is 15.7°C (60.3°F). For swimming, a surface water temperature of 15.7°C (60.3°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in July in Cardiff?

In July, the average length of the day in Cardiff, United Kingdom, is 16.1h.

What month has the most sunshine in Cardiff?

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

How many hours of sunshine does Cardiff have in July?

The average sunshine in July is 6.4h.

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

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

What is the UV index intensity in July in Cardiff?

In Cardiff, United Kingdom, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in July - Cardiff, United Kingdom
  • Average high temperature in July: 21.7°C

The warmest month (with the highest average high temperature) is July (21.7°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in July: 13.1°C

The month with the highest average low temperature is July (13.1°C).
The coldest month (with the lowest average low temperature) is February (2.1°C).

Average rainfall in July - Cardiff, United Kingdom
  • Average rainfall in July: 78.4mm

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 in July - Cardiff, United Kingdom
  • Average rainfall days in July: 10.7 days

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 in July - Cardiff, United Kingdom
  • Average sea temperature in July: 15.7°C

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 in July / Average sunshine in July - Cardiff, United Kingdom
  • Average daylight in July: 16.1h

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

  • Average sunshine in July: 6.4h

The month with most sunshine is July (Average sunshine: 6.4h).
The month with least sunshine is December (Average sunshine: 1.6h).

Average UV index in July - Cardiff, United Kingdom
  • Average UV index in July: 6

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 0).