Sligo weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Sligo in September. Check more long-term weather averages for Sligo in September before you book your next holiday to Ireland in 2025/2026.

  • 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

More about Sligo

Sligo by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ireland

  • Find hotel deals & special offers for popular destinations
  • Filter hotel deals by price, board basis, star rating & more
  • Choose from over 400,000 hotels worldwide

The September weather guide for Ireland (Sligo) 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)

Back to top

More about Ireland

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 September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:42 19:24
Monday, 15th September 2025 06:07 18:50
Tuesday, 30th September 2025 06:34 18:12

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^