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The temperatures in Cardiff in December are quite cold with temperatures between 5°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Cardiff. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Cardiff can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Cardiff in December 2024.
If you’re planning to visit Cardiff in the near future, we highly recommend that you review the 14 day weather forecast for Cardiff before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 8 | 20 | 3 | 86 mm | Awful | Cardiff in January |
| February | 8° / 4° | 8 | 18 | 3 | 77 mm | Awful | Cardiff in February |
| March | 10° / 4° | 6 | 24 | 1 | 62 mm | Ok | Cardiff in March |
| April | 12° / 6° | 5 | 25 | 0 | 48 mm | Ok | Cardiff in April |
| May | 15° / 8° | 5 | 26 | 0 | 71 mm | Good | Cardiff in May |
| June | 18° / 11° | 5 | 25 | 0 | 72 mm | Good | Cardiff in June |
| July | 20° / 13° | 5 | 26 | 0 | 77 mm | Good | Cardiff in July |
| August | 19° / 13° | 6 | 25 | 0 | 85 mm | Good | Cardiff in August |
| September | 18° / 12° | 4 | 26 | 0 | 56 mm | Good | Cardiff in September |
| October | 14° / 10° | 7 | 24 | 0 | 99 mm | Ok | Cardiff in October |
| November | 11° / 7° | 8 | 22 | 0 | 101 mm | Bad | Cardiff in November |
| December | 9° / 5° | 9 | 21 | 2 | 105 mm | Awful | Cardiff in December |