Okayama weather in December 2025

Expect daytime maximum temperatures of 11°C in Okayama, Japan in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall.

  • 11°C maximum daytime temperature in December in Okayama11
    11°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in December in Okayama15
    15 days with some rainfall
  • 2°C minimum night-time temperature in December in Okayama2
    2°C min night temperature
  • 10 hours of daylight per day in December in Okayama10
    10 hours of daylight per day
  • No heat & humidity in December in Okayama0
    No heat & humidity
  • 32 mm monthly rainfall in December in Okayama32
    32 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Okayama2
    2 (Low) UV index

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The December weather guide for Japan (Okayama) 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 Japan

How warm is it in Okayama in December?

Daytime temperatures usually reach 12°C in Okayama in December, falling to 3°C at night.

How sunny is it in Okayama in December?

There are normally 6 hours of bright sunshine each day in Okayama in December - that's 57% of daylight hours.

How warm is the sea around Okayama in December?

The average sea temperature around Okayama in December is 17°C.

Does it rain in Okayama in December?

There are usually 9 days with some rain in Okayama in December and the average monthly rainfall is 44mm.

Okayama December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:53 16:53
Tuesday, 16th December 2025 07:04 16:55
Wednesday, 31st December 2025 07:11 17:03

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