Northern Ireland weather in September 2022

  • 16°C maximum daytime temperature in September in Northern Ireland (Belfast)16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in September in Northern Ireland (Belfast)17
    17 days with some rainfall
  • 9°C minimum night-time temperature in September in Northern Ireland (Belfast)9
    9°C min night temperature
  • 13 hours of daylight per day in September in Northern Ireland (Belfast)13
    13 hours of daylight per day
  • No heat & humidity in September in Northern Ireland (Belfast)0
    No heat & humidity
  • 94 mm monthly rainfall in September in Northern Ireland (Belfast)94
    94 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Northern Ireland (Belfast)3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Northern Ireland (Belfast)14
    14°C sea temperature

Below are average maximum temperatures at popular destinations in Northern Ireland in September. Select a destination to see more weather parameters.

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Recommended for Northern Ireland

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 Northern Ireland in September?

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

How sunny is it in Northern Ireland in September?

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

How warm is the sea around Northern Ireland in September?

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

Does it rain in Northern Ireland in September?

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

Northern Ireland September sunrise & sunset times

Browse the sunrise and sunset times for Northern Ireland in September 2022. Select a month to view Northern Ireland sunrise and sunset times for the next 12 months. The Northern Ireland sunrise and sunset times shown below are for Belfast.

JanFebMarAprMayJunJulAugSepOctNovDec

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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