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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the NewsPrism weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The weather in Mountain Ash today, as shown in the live forecast above, brings overcast skies and patchy light rain, typical for the South Wales Valleys. The week ahead stays unsettled with occasional brighter breaks between showers.
What is the weather in Mountain Ash today?
Cloud dominates through the morning with a moderate south-westerly breeze. Rain is most likely during the early afternoon before easing later. The live forecast above gives hour-by-hour detail.
- Cloudy start, hill fog possible on higher ground
- Breezy, with winds around 15–20 mph
- Light rain arriving by lunchtime, turning showery
- Evening: drier with some clearance
What can we expect for the rest of the week?
A low-pressure system keeps things changeable. The Met Office weather for Mountain Ash shows a mix of rain and brighter intervals through midweek, with the chance of a drier weekend.
- Wednesday: further showers, especially in the afternoon
- Thursday: perhaps drier, but still mostly cloudy
- Weekend: improving, with more in the way of sunshine on Saturday
- Temperatures close to February averages throughout
Will it rain in Mountain Ash tomorrow?
Yes, there is a chance of rain tomorrow morning, particularly before midday. Brighter spells are likely later in the afternoon. Check the live forecast above for precise timing and intensity.
Is there a Met Office weather warning for Mountain Ash?
No warnings are currently in force for the area. However, low pressure moving in later in the week could bring gusty winds, so it is worth monitoring the Met Office website for updates.
How does the weather in Mountain Ash compare to nearby Cardiff?
Both see similar conditions, but Mountain Ash, being inland and higher, is often a degree or two cooler and more prone to hill fog. Cardiff benefits from milder coastal air, especially overnight.
For the full outlook across Britain, check the UK weather hub. If you are planning ahead, our 10 Day Weather Forecast UK page gives extended details. For regional comparisons, Bristol Weather often shares similar maritime influences.