Sligo weather in September 2021

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  • 16°C maximum daytime temperature in September in Sligo16
    16°C max day temperature
  • 3 hours of sunshine per day
  • 21 days with some rainfall in September in Sligo21
    21 days with some rainfall
  • 8°C minimum night-time temperature in September in Sligo8
    8°C min night temperature
  • 13 hours of daylight per day in September in Sligo13
    13 hours of daylight per day
  • No heat & humidity in September in Sligo0
    No heat & humidity
  • 123 mm monthly rainfall in September in Sligo123
    123 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Sligo3
    3 (Moderate) UV index
  • 15°C sea temperature in September in Sligo15
    15°C sea temperature

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The September weather guide for Sligo, Ireland 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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Sligo holiday rentals

Find holiday rentals in Sligo, County Sligo, Ireland including holiday homes, self-catering accommodation, B&Bs, shared space, home swaps and short-term lets.

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Sligo camping & hostels

Looking for camping holidays in Sligo, County Sligo, Ireland? Browse hostels and campsites for camping, glamping, yurts, cabins, tree houses, youth hostels and caravan parks.

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Sligo car hire

Need to hire a car for Sligo, County Sligo, Ireland? Check out the car hire companies and brokers offering car rentals for Sligo, County Sligo, Ireland.

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How warm is it in Sligo in September?

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

How sunny is it in Sligo in September?

There are normally 3 hours of bright sunshine each day in Sligo in September - that's 26% of daylight hours.

How warm is the sea around Sligo in September?

The average sea temperature around Sligo in September is 15°C.

Does it rain in Sligo in September?

There are usually 21 days with some rain in Sligo in September and the average monthly rainfall is 123mm.

Sligo sunrise & sunset times for September 2021

Browse the sunrise & sunset times for Sligo in September 2021. Select a month to view Sligo sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:42 20:25
Wednesday, 15th September 2021 07:07 19:50
Thursday, 30th September 2021 07:34 19:12
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Ireland in September for 2021/2022?

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

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