Belfast weather in September 2022

  • 16°C maximum daytime temperature in September in Belfast16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in September in Belfast17
    17 days with some rainfall
  • 9°C minimum night-time temperature in September in Belfast9
    9°C min night temperature
  • 13 hours of daylight per day in September in Belfast13
    13 hours of daylight per day
  • No heat & humidity in September in Belfast0
    No heat & humidity
  • 94 mm monthly rainfall in September in Belfast94
    94 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Belfast3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Belfast14
    14°C sea temperature
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The September weather guide for Northern Ireland (Belfast) 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.

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

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More about the UK

How warm is it in Belfast in September?

Daytime temperatures usually reach 16°C in Belfast in September, falling to 9°C at night.

How sunny is it in Belfast in September?

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

How warm is the sea around Belfast in September?

The average sea temperature around Belfast in September is 14°C.

Does it rain in Belfast in September?

There are usually 17 days with some rain in Belfast in September and the average monthly rainfall is 94mm.

Belfast September sunrise & sunset times

Browse the sunrise and sunset times for Belfast in September 2022. Select a month to view Belfast sunrise and sunset times for the next 12 months.


Date Sunrise times Sunset times
Thursday, 1st September 2022 06:31 20:15
Thursday, 15th September 2022 06:56 19:40
Friday, 30th September 2022 07:24 19:02

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