Koya weather in January 2026

Expect daytime maximum temperatures of 43°F in Koya, Japan in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 17 days with some rainfall and typically 2.0 inches of rainfall in the month.

  • 43°F maximum daytime temperature in January in Koya43
    43°F max day temperature
  • 5 hours of sunshine per day
  • 17 days with some rainfall in January in Koya17
    17 days with some rainfall
  • 30°F minimum night-time temperature in January in Koya30
    30°F min night temperature
  • 10 hours of daylight per day in January in Koya10
    10 hours of daylight per day
  • No heat & humidity in January in Koya0
    No heat & humidity
  • 2.0 inches monthly rainfall in January in Koya2.0
    2.0 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in Koya3
    3 (Moderate) UV index

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The January weather guide for Japan (Koya) 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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How cold is it in Koya in January?

Daytime temperatures usually reach 43°F in Koya in January, falling to 30°F at night.

How sunny is it in Koya in January?

There are normally 5 hours of bright sunshine each day in Koya in January - that's 46% of daylight hours.

Does it rain in Koya in January?

There are usually 17 days with some rain in Koya in January and the average monthly rainfall is 2.0 inches.

Koya January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:04 16:59
Friday, 16th January 2026 07:03 17:12
Saturday, 31st January 2026 06:56 17:26

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