Mallow weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Mallow in September. Check more long-term weather averages for Mallow in September before you book your next holiday to Ireland in 2025/2026.

  • 16°C maximum daytime temperature in September in Mallow16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in September in Mallow18
    18 days with some rainfall
  • 9°C minimum night-time temperature in September in Mallow9
    9°C min night temperature
  • 13 hours of daylight per day in September in Mallow13
    13 hours of daylight per day
  • No heat & humidity in September in Mallow0
    No heat & humidity
  • 101 mm monthly rainfall in September in Mallow101
    101 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Mallow4
    4 (Moderate) UV index

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

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

How sunny is it in Mallow in September?

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

Does it rain in Mallow in September?

There are usually 18 days with some rain in Mallow in September and the average monthly rainfall is 101mm.

Mallow September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:46 19:22
Monday, 15th September 2025 06:09 18:49
Tuesday, 30th September 2025 06:34 18:14

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