Builth Wells weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Builth Wells in September based on long-term weather averages. There is usually 16 days with some rainfall and 111 mm of average monthly rainfall in September.

  • 16°C maximum daytime temperature in September in Builth Wells16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Builth Wells16
    16 days with some rainfall
  • 8°C minimum night-time temperature in September in Builth Wells8
    8°C min night temperature
  • 13 hours of daylight per day in September in Builth Wells13
    13 hours of daylight per day
  • No heat & humidity in September in Builth Wells0
    No heat & humidity
  • 111 mm monthly rainfall in September in Builth Wells111
    111 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Builth Wells4
    4 (Moderate) UV index

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The September weather guide for Wales (Builth Wells) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Wales

How warm is it in Builth Wells in September?

Daytime temperatures usually reach 16°C in Builth Wells in September, falling to 8°C at night.

How sunny is it in Builth Wells in September?

There are normally 4 hours of bright sunshine each day in Builth Wells in September - that's 30% of daylight hours.

Does it rain in Builth Wells in September?

There are usually 16 days with some rain in Builth Wells in September and the average monthly rainfall is 111mm.

Builth Wells September sunrise & sunset times

Browse the sunrise and sunset times for Builth Wells in September 2025. Select a month to view Builth Wells sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:25 19:01
Monday, 15th September 2025 05:48 18:28
Tuesday, 30th September 2025 06:13 17:53

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