Weather in Cardiff in August 2018

  • 20°C maximum daytime temperature in August in Cardiff20
    20°C max day temperature
  • 6 hours of sunshine per day (41% of daylight hours) in August in Cardiff6
    6 hours of sunshine per day
  • 15 days with some rainfall in August in Cardiff15
    15 days with some rainfall
  • 12°C minimum night-time temperature in August in Cardiff12
    12°C min night temperature
  • 15 hours of daylight per day in August in Cardiff15
    15 hours of daylight per day
  • No heat & humidity in August in Cardiff0
    No heat & humidity
  • 81 mm monthly rainfall in August in Cardiff81
    81 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Cardiff6
    6 (High) UV index
  • 18°C sea temperature in August in Cardiff18
    18°C sea temperature

Going to Cardiff? Find the best month to visit Cardiff based on the weather.

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Expect 20°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Cardiff in August. Check more long-term weather averages for Cardiff in August before you book your next holiday to UK in 2018.

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More about Cardiff

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Metric (°C / mm)  |  Imperial (°F / inches)

Guide to Cardiff weather in August

The average maximum daytime temperature in Cardiff in August is a comfortable 20°C (68°F). The average night-time temperature is usually a cool 12°C (54°F). There are usually 6 hours of bright sunshine each day, which represents 41% of the 15 hours of daylight.

Expect 81mm (3.2 inches) of rainfall across the whole of August with 15 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.

The average sea temperature in and around Cardiff in August is 18°C (64°F).

Cardiff sunrise & sunset times for August 2018

Browse the sunrise & sunset times for Cardiff in August 2018. Select a month to view Cardiff sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st August 2018 05:36 21:01
Thursday, 2nd August 2018 05:38 20:59
Friday, 3rd August 2018 05:39 20:57
Saturday, 4th August 2018 05:41 20:56
Sunday, 5th August 2018 05:42 20:54
Monday, 6th August 2018 05:44 20:52
Tuesday, 7th August 2018 05:46 20:50
Wednesday, 8th August 2018 05:47 20:49
Thursday, 9th August 2018 05:49 20:47
Friday, 10th August 2018 05:50 20:45
Saturday, 11th August 2018 05:52 20:43
Sunday, 12th August 2018 05:53 20:41
Monday, 13th August 2018 05:55 20:39
Tuesday, 14th August 2018 05:56 20:37
Wednesday, 15th August 2018 05:58 20:35
Thursday, 16th August 2018 06:00 20:33
Friday, 17th August 2018 06:01 20:31
Saturday, 18th August 2018 06:03 20:29
Sunday, 19th August 2018 06:04 20:27
Monday, 20th August 2018 06:06 20:25
Tuesday, 21st August 2018 06:08 20:23
Wednesday, 22nd August 2018 06:09 20:21
Thursday, 23rd August 2018 06:11 20:19
Friday, 24th August 2018 06:12 20:17
Saturday, 25th August 2018 06:14 20:15
Sunday, 26th August 2018 06:15 20:12
Monday, 27th August 2018 06:17 20:10
Tuesday, 28th August 2018 06:19 20:08
Wednesday, 29th August 2018 06:20 20:06
Thursday, 30th August 2018 06:22 20:04
Friday, 31st August 2018 06:23 20:01
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