Climate almanac
Mountain Ash
Wales, United Kingdom · 51.68°, -3.38°
What is the weather like in Mountain Ash in September?
In September, Mountain Ash is typically 62°F (17°C) during the day and 50°F (10°C) at night. The month brings about 4.7 in (119 mm) of precipitation in total.
- Average high62°F (17°C)
- Average low50°F (10°C)
- Precipitation4.7 in (119 mm)
- Clear or mostly clear days3
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)