Cardiff Weather in May

May in Cardiff sees daytime temperatures around 16°C (61°F) and lows of 9°C (48°F) at night. With around 79 mm (3.1 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Cardiff in May

Records from the past 30 years suggest around 15 days of rain, with 79 mm (3.1 in) average for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Cardiff in May

Daytime temperatures in Cardiff reach 16°C (61°F) in May, dropping to 9°C (48°F) at night. Conditions are often most pleasant around the middle of the day. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Cardiff in May

Expect sunny days throughout the month, with an estimated 197 hours of sunshine. This makes it a pleasant time to visit Cardiff.

Wind Speed in Cardiff in May

Wind speeds average 4 m/s (8 knots) during May. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in May

At 11°C (52°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Cardiff.