Londonderry weather in August 2026

Expect daytime maximum temperatures of 17°C in Londonderry, Northern Ireland in August based on long-term weather averages. There are 4 hours of sunshine per day on average with 20 days with some rainfall and typically 99 mm of rainfall in the month.

  • 17°C maximum daytime temperature in August in Londonderry17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 20 days with some rainfall in August in Londonderry20
    20 days with some rainfall
  • 10°C minimum night-time temperature in August in Londonderry10
    10°C min night temperature
  • 15 hours of daylight per day in August in Londonderry15
    15 hours of daylight per day
  • No heat & humidity in August in Londonderry0
    No heat & humidity
  • 99 mm monthly rainfall in August in Londonderry99
    99 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Londonderry5
    5 (Moderate) UV index

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The August weather guide for Northern Ireland (Londonderry) 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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How hot is it in Londonderry in August?

Daytime temperatures usually reach 18°C in Londonderry in August, falling to 11°C at night.

How sunny is it in Londonderry in August?

There are normally 5 hours of bright sunshine each day in Londonderry in August - that's 32% of daylight hours.

How warm is the sea around Londonderry in August?

The average sea temperature around Londonderry in August is 13°C.

Does it rain in Londonderry in August?

There are usually 17 days with some rain in Londonderry in August and the average monthly rainfall is 89mm.

Londonderry August sunrise & sunset times

Browse the sunrise and sunset times for Londonderry in August 2026. Select a month to view Londonderry sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 04:38 20:32
Sunday, 16th August 2026 05:06 20:00
Monday, 31st August 2026 05:34 19:24

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