Cardiff Weather in May

Cool, with some rainy days. Average highs of 16°C and lows of 9°C, with around 12 rainy days expected throughout the month.

While May isn't our top-rated month for Cardiff, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.

Average high

16°C

Average low

9°C

Rainy days

12 days

Best months to visit

Year-round

What to do in Cardiff in May

Whatever the weather, Cardiff rewards curious visitors. Here are some of the best ways to spend your time:

Tour Cardiff Castle from Roman times Visit the National Museum Cardiff (free) Explore the Victorian and Edwardian shopping arcades Walk Bute Park and see Cathays Park's government buildings Day trip to nearby Caerphilly Castle Catch rugby at the Millennium Stadium

What to pack for May

Layer up — a mid-weight jacket, jumpers, and comfortable trousers. Waterproof shoes are recommended. Scarves and gloves may be useful in the evenings.