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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Culture Observer weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Rumney experiences a mild, damp maritime climate typical of South Wales, with cool winters and warm summers. The live forecast above shows current conditions; for most visitors, late spring through early autumn offers the most reliable weather.
What is the weather like in Rumney?
Rumney, a suburban area of Cardiff, sits in the Vale of Glamorgan and shares the region’s temperate oceanic pattern. Winters rarely drop below freezing for long, while summers seldom exceed 26°C. Rainfall is spread fairly evenly, with October to January being wettest. Cloud cover is frequent, but prolonged sunny spells occur, especially from May to August. The best views of the surrounding countryside come after a rain shower has cleared.
When is the best time to visit Rumney?
For the driest and brightest days, aim for June through August. Pack a light waterproof jacket and layers even in summer – the breeze off the Bristol Channel can feel cool. September offers a quieter, good-value window with milder temperatures and fewer crowds. School holidays fall mainly in late July and August, so booking early for those weeks is wise. April and May see increasing warmth but also the risk of sharp showers.
What is the weather in Rumney today?
The live forecast above gives the most up-to-date reading for Rumney. For a more detailed outlook, check bbc weather rumney or look at our UK 10-day forecast for the wider Cardiff area.
Does it rain a lot in Rumney?
Yes, Rumney receives around 1,050 mm of rain per year, which is above the UK average of 885 mm. Rain is frequent but often light, and no month is completely dry. The wettest period is from October to January.
What is the driest month in Rumney?
May is typically the driest month in Rumney, with an average of about 60 mm of rainfall. June and July are also relatively dry, though afternoon thunderstorms occasionally develop. For the most reliable dry spell, aim for late spring or early summer.