Cardiff, Wales, United Kingdom climate
Average temperatures, precipitation and all-time records for Cardiff, Wales, United Kingdom, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 19°C, and its coldest is February, with an average low of 3°C.
Cardiff is the capital and largest city of Wales. Cardiff had a population of 383,919 in 2024 and forms a principal area officially known as the City and County of Cardiff. The city is the eleventh largest in the United Kingdom. via Wikipedia
Cardiff average temperatures by month
Typical daily high and low, and average precipitation, for each month in Cardiff, Wales, United Kingdom, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 7°C | 3°C | 3 mm |
| February | 7°C | 3°C | 3 mm |
| March | 9°C | 4°C | 3 mm |
| April | 12°C | 5°C | 3 mm |
| May | 15°C | 8°C | 3 mm |
| June | 17°C | 11°C | 3 mm |
| July | 19°C | 13°C | 3 mm |
| August | 19°C | 14°C | 3 mm |
| September | 17°C | 12°C | 3 mm |
| October | 14°C | 9°C | 3 mm |
| November | 10°C | 6°C | 3 mm |
| December | 8°C | 4°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 32°C on 2022-07-18
- Coldest day on record: -11°C on 2010-12-25
Percentiles compare each day to Cardiff, Wales, United Kingdom's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →