City in Wales, United Kingdom
Cardiff weather by month and the best time to visit
When to go to Cardiff
May–September is warmest. Match days at Principality Stadium (rugby, Six Nations Feb–Mar) fill pubs and hotels; winters are wet and grey.
Cardiff weather by month
Average daily high, rainfall and conditions.
- Jan8°94 mm
- Feb8°73 mm
- Mar10°70 mm
- Apr13°56 mm
- May16°67 mm
- Jun19°72 mm
- Jul20°80 mm
- Aug20°84 mm
- Sep18°63 mm
- Oct15°100 mm
- Nov11°103 mm
- Dec8°104 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 8°C46°F | 4°C38°F | 94 mm | 93% | Cold |
| February | 8°C46°F | 3°C38°F | 73 mm | 91% | Cold |
| March | 10°C49°F | 4°C39°F | 70 mm | 89% | Cold |
| April | 13°C55°F | 6°C42°F | 56 mm | 85% | Cool |
| May | 16°C61°F | 8°C47°F | 67 mm | 83% | Cool |
| June | 19°C66°F | 12°C53°F | 72 mm | 82% | Pleasant |
| July | 20°C69°F | 13°C56°F | 80 mm | 82% | Pleasant |
| August | 20°C68°F | 13°C56°F | 84 mm | 84% | Pleasant |
| September | 18°C65°F | 11°C53°F | 63 mm | 85% | Pleasant |
| October | 15°C59°F | 9°C49°F | 100 mm | 89% | Cool |
| November | 11°C52°F | 6°C44°F | 103 mm | 92% | Cold |
| December | 8°C47°F | 4°C40°F | 104 mm | 93% | Cold |
Best months across United Kingdom
| Place | Best months | Warmest month |
|---|---|---|
| London | May–Jul, Sep | Jul (23°C) |
| Edinburgh | May–Jun, Aug–Sep | Jul (18°C) |
| Manchester | May–Jul, Sep | Jul (20°C) |
| Liverpool | May–Jul, Sep | Jul (19°C) |
| Oxford | May–Jun, Sep | Jul (22°C) |
| Bath | May–Jun, Sep | Jul (21°C) |
| Cambridge | May–Jun, Sep | Jul (23°C) |
| Glasgow | May–Jul, Sep | Jul (18°C) |
| Brighton | May–Jul, Sep | Jul (21°C) |
| Scottish Highlands | May–Jun, Sep | Jul (18°C) |
| Isle of Skye | May–Jun, Sep | Jul (15°C) |
| York | May–Jun, Sep–Oct | Jul (21°C) |
| Bristol | May–Jul, Sep | Jul (22°C) |
| Lake District | May–Jun, Sep–Oct | Jul (18°C) |
| Cornwall | May–Jun, Sep | Jul (18°C) |
| Cotswolds | May–Jun, Sep–Oct | Jul (22°C) |
| Belfast | May–Jul, Sep | Jul (17°C) |
| Cardiff | May–Jul, Sep | Jul (20°C) |
| Birmingham | May–Jul, Sep | Jul (21°C) |
| Newcastle | May–Jul, Sep | Jul (19°C) |
| Leeds | May–Jul, Sep | Jul (21°C) |
| Snowdonia | May–Jul, Sep | Jul (19°C) |
Quick answers
What is the best month to visit Cardiff?
May–Jul, Sep. May–September is warmest. Match days at Principality Stadium (rugby, Six Nations Feb–Mar) fill pubs and hotels; winters are wet and grey.
When is the rainy season in Cardiff?
Rain peaks in December with about 104 mm. No month averages 150 mm or more.
What is the hottest month in Cardiff?
July, with average highs of 20°C (69°F).
How cold does Cardiff get?
The coolest nights are in February, averaging 3°C (38°F).
More about Cardiff
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Sources
- NASA POWER climatology (2001–2020)
- Visit Cardiff
- Transport for Wales
- Cardiff Airport
- Cardiff and Vale University Health Board
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.5°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.