Carlow weather in September 2025

Expect daytime maximum temperatures of 17°C in Carlow in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 16 days with some rainfall and typically 84 mm of rainfall in the month.

  • 17°C maximum daytime temperature in September in Carlow17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Carlow16
    16 days with some rainfall
  • 9°C minimum night-time temperature in September in Carlow9
    9°C min night temperature
  • 13 hours of daylight per day in September in Carlow13
    13 hours of daylight per day
  • No heat & humidity in September in Carlow0
    No heat & humidity
  • 84 mm monthly rainfall in September in Carlow84
    84 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Carlow4
    4 (Moderate) UV index

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The September weather guide for Ireland (Carlow) 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 Carlow in September?

Daytime temperatures usually reach 17°C in Carlow in September, falling to 9°C at night.

How sunny is it in Carlow in September?

There are normally 4 hours of bright sunshine each day in Carlow in September - that's 31% of daylight hours.

Does it rain in Carlow in September?

There are usually 16 days with some rain in Carlow in September and the average monthly rainfall is 84mm.

Carlow September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:38 19:16
Monday, 15th September 2025 06:02 18:43
Tuesday, 30th September 2025 06:28 18:07

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