Oslo weather in August 2025

Expect daytime maximum temperatures of 20°C in Oslo, Norway in August based on long-term weather averages. There are 7 hours of sunshine per day on average with 16 days with some rainfall and typically 91 mm of rainfall in the month.

  • 20°C maximum daytime temperature in August in Oslo20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 16 days with some rainfall in August in Oslo16
    16 days with some rainfall
  • 10°C minimum night-time temperature in August in Oslo10
    10°C min night temperature
  • 16 hours of daylight per day in August in Oslo16
    16 hours of daylight per day
  • No heat & humidity in August in Oslo0
    No heat & humidity
  • 91 mm monthly rainfall in August in Oslo91
    91 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in August in Oslo4
    4 (Moderate) UV index
  • 18°C sea temperature in August in Oslo18
    18°C sea temperature

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The August weather guide for Norway (Oslo) 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 Norway

How hot is it in Oslo in August?

Daytime temperatures usually reach 20°C in Oslo in August, falling to 10°C at night.

How sunny is it in Oslo in August?

There are normally 7 hours of bright sunshine each day in Oslo in August - that's 43% of daylight hours.

How warm is the sea around Oslo in August?

The average sea temperature around Oslo in August is 18°C.

Does it rain in Oslo in August?

There are usually 16 days with some rain in Oslo in August and the average monthly rainfall is 91mm.

Oslo August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 03:59 20:46
Saturday, 16th August 2025 04:34 20:06
Sunday, 31st August 2025 05:10 19:23

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