Cavan weather in September 2025

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

  • 16°C maximum daytime temperature in September in Cavan16
    16°C max day temperature
  • 3 hours of sunshine per day
  • 18 days with some rainfall in September in Cavan18
    18 days with some rainfall
  • 8°C minimum night-time temperature in September in Cavan8
    8°C min night temperature
  • 13 hours of daylight per day in September in Cavan13
    13 hours of daylight per day
  • No heat & humidity in September in Cavan0
    No heat & humidity
  • 98 mm monthly rainfall in September in Cavan98
    98 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Cavan4
    4 (Moderate) UV index

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The September weather guide for Ireland (Cavan) 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 Ireland

How warm is it in Cavan in September?

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

How sunny is it in Cavan in September?

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

Does it rain in Cavan in September?

There are usually 18 days with some rain in Cavan in September and the average monthly rainfall is 98mm.

Cavan September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:38 19:20
Monday, 15th September 2025 06:03 18:45
Tuesday, 30th September 2025 06:30 18:08

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