Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
With the onset of August, the average high-temperature stands at a still refreshing 18.5°C (65.3°F), closely aligned with July's 19°C (66.2°F). An average low-temperature of 13.3°C (55.9°F) marks the nights in Cardiff, United Kingdom throughout August.Humidity
In August, the average relative humidity in Cardiff is 83%.Rainfall
The wettest months in Cardiff are August and November, with an average 31mm (1.22") of rainfall.Snowfall
In Cardiff, snow does not fall in March through October.Sea temperature
August and September, with an average sea temperature of 16.6°C (61.9°F), are months with the warmest seawater in Cardiff.Note: In 16.6°C (61.9°F), swimming is not an enjoyable activity for most. The challenge of managing one's breathing increases as the temperature goes under 21°C (69.8°F).
Daylight
In August, the average length of the day in Cardiff, United Kingdom, is 14h and 33min.On the first day of the month, sunrise is at 5:37 am and sunset at 9:00 pm. On the last day of August, sunrise is at 6:24 am and sunset at 8:00 pm BST.
Sunshine
The average sunshine in August is 7.6h.UV index
The months with the highest UV index in Cardiff are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during August leads to these advisories:
Undertake protective steps - Recommendations to avoid sunburn are issued. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the average August temperature in Cardiff?
What is the average humidity in August in Cardiff?
What is the rainiest month in Cardiff?
How many days does it rain in August in Cardiff?
When it does not snow in Cardiff?
When is the sea warmest in Cardiff?
What is the sea temperature in August in Cardiff?
What is the average length of the day in August in Cardiff?
When are sunrise and sunset in August in Cardiff?
How long on average sun shines in August in Cardiff?
What are the months with the highest UV index in Cardiff?
How high is the UV index in August in Cardiff?
Average temperature in August
Cardiff, United Kingdom
- Average high temperature in August: 18.5°C
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (7.5°C).
- Average low temperature in August: 13.3°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in August
Cardiff, United Kingdom
- Average pressure in August: 1014.7mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in August
Cardiff, United Kingdom
- Average wind speed in August: 16km/h
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 in August
Cardiff, United Kingdom
- Average humidity in August: 83%
The months with the highest relative humidity are November and December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in August
Cardiff, United Kingdom
- Average rainfall in August: 31mm
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 in August
Cardiff, United Kingdom
- Average rainfall days in August: 13.2 days
The month with the highest number of rainy days is November (13.5 days).
The months with the least rainy days are February and April (9.1 days).
Average snowfall in August
Cardiff, United Kingdom
- Average snowfall in August: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in August
Cardiff, United Kingdom
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in August
Cardiff, United Kingdom
- Average sea temperature in August: 16.6°C
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 in August /
Average sunshine in August
Cardiff, United Kingdom
- Average daylight in August: 14h and 3min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in August: 7h and 4min
The month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in August
Cardiff, United Kingdom
- Average sunshine days in August: 14.2 days
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 in August
Cardiff, United Kingdom
- Average UV index in August: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Cardiff, United Kingdom
- Average cloud cover in August: 51
The month with the most cloud cover is November (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in August
Cardiff, United Kingdom
- Average visibility in August: 9km
The months with the highest visibility are February, March and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).
Cardiff, United Kingdom
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