Jeju weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Jeju in August. Check more long-term weather averages for Jeju in August before you book your next holiday to South Korea in 2025/2026.

  • 29°C maximum daytime temperature in August in Jeju29
    29°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in August in Jeju11
    11 days with some rainfall
  • 23°C minimum night-time temperature in August in Jeju23
    23°C min night temperature
  • 13 hours of daylight per day in August in Jeju13
    13 hours of daylight per day
  • High heat & humidity in August in JejuH
    High heat & humidity
  • 253 mm monthly rainfall in August in Jeju253
    253 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Jeju10
    10 (Very High) UV index
  • 27°C sea temperature in August in Jeju27
    27°C sea temperature

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The August weather guide for South Korea (Jeju) 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 Jeju in August?

Daytime temperatures usually reach 29°C in Jeju in August with high heat and humidity, falling to 23°C at night.

How sunny is it in Jeju in August?

There are normally 7 hours of bright sunshine each day in Jeju in August - that's 55% of daylight hours.

How warm is the sea around Jeju in August?

The average sea temperature around Jeju in August is 27°C.

Does it rain in Jeju in August?

There are usually 11 days with some rain in Jeju in August and the average monthly rainfall is 253mm.

What is the chance of a typhoon in Jeju in August?

On average 2 days in August in Jeju are likely to be affected by the passage of one or more tropical storms.

Jeju August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:46 19:34
Saturday, 16th August 2025 05:57 19:19
Sunday, 31st August 2025 06:07 19:01

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