Reykjavik weather in August 2025

Expect daytime maximum temperatures of 54°F in Reykjavik, Iceland in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 18 days with some rainfall and typically 3.3 inches of rainfall in the month.

  • 54°F maximum daytime temperature in August in Reykjavik54
    54°F max day temperature
  • 5 hours of sunshine per day
  • 18 days with some rainfall in August in Reykjavik18
    18 days with some rainfall
  • 45°F minimum night-time temperature in August in Reykjavik45
    45°F min night temperature
  • 16 hours of daylight per day in August in Reykjavik16
    16 hours of daylight per day
  • No heat & humidity in August in Reykjavik0
    No heat & humidity
  • 3.3 inches monthly rainfall in August in Reykjavik3.3
    3.3 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in August in Reykjavik3
    3 (Moderate) UV index
  • 52°F sea temperature in August in Reykjavik52
    52°F sea temperature

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The August weather guide for Iceland (Reykjavik) 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)  |  Imperial (°F)

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More about Iceland

How warm is it in Reykjavik in August?

Daytime temperatures usually reach 54°F in Reykjavik in August, falling to 45°F at night.

How sunny is it in Reykjavik in August?

There are normally 5 hours of bright sunshine each day in Reykjavik in August - that's 29% of daylight hours.

How warm is the sea around Reykjavik in August?

The average sea temperature around Reykjavik in August is 52°F.

Does it rain in Reykjavik in August?

There are usually 18 days with some rain in Reykjavik in August and the average monthly rainfall is 3.3 inches.

Reykjavik August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:35 22:30
Saturday, 16th August 2025 05:22 21:39
Sunday, 31st August 2025 06:08 20:46

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