Cardiff, United Kingdom: Annual Weather Averages
July is the hottest month in Cardiff with an average temperature of 16°C (61°F) and the coldest is February at 4°C (39°F) with the most daily sunshine hours at 7 in July. The wettest month is January with an average of 90mm of rain. The best month to swim in the sea is in August when the average sea temperature is 16.5°C (62°F).
Average Temperature: Cardiff
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 5 | 4 | 7 | 8 | 11 | 14 | 16 | 16 | 15 | 12 | 8 | 6 |
| °F | 41 | 39 | 44 | 46 | 52 | 57 | 61 | 61 | 58 | 53 | 46 | 43 |
Average High/Low Temperature: Cardiff
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 7 | 6 | 9 | 12 | 15 | 18 | 20 | 20 | 18 | 14 | 10 | 8 |
| Low °C | 3 | 2 | 4 | 4 | 7 | 10 | 12 | 12 | 11 | 9 | 5 | 4 |
| High °F | 45 | 43 | 48 | 54 | 59 | 64 | 68 | 68 | 64 | 57 | 50 | 46 |
| Low °F | 37 | 36 | 39 | 39 | 45 | 50 | 54 | 54 | 52 | 48 | 41 | 39 |
Average Rainfall: Cardiff
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 90 | 60 | 90 | 40 | 30 | 40 | 40 | 60 | 50 | 70 | 70 | 70 |
| Days | 22 | 18 | 19 | 18 | 17 | 16 | 17 | 17 | 17 | 22 | 21 | 20 |
Average Daily Sunshine Hours: Cardiff
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 2 | 2 | 4 | 6 | 7 | 7 | 7 | 6 | 5 | 3 | 3 | 2 |
Average Sea Temperature: Cardiff
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 9 | 9 | 9 | 10 | 12 | 14 | 16 | 17 | 17 | 16 | 14 | 12 |
| °F | 48 | 48 | 47 | 50 | 53 | 56 | 60 | 62 | 62 | 60 | 57 | 53 |
