Koya weather live forecast

Today's maximum temperature in Koya is expected to be 25°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

5-day weather forecast updated at 04:03 on Thursday 18th September 2025 GMT

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The 5-day weather forecast for Japan (Koya) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Koya weather forecast by day

Below are the detailed weather forecasts for Koya for the next 5 days.

Koya weather for Thursday 18th September 2025

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 25°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 58% chance of some rain and a light breeze of 11 kph from the north-west.

  • 25°C maximum temperature25
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 58% chance of some rain58
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Koya weather for Friday 19th September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south-east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 6 kph from the South-East6
    kph wind from SE

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Koya weather for Saturday 20th September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 23°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south.

  • 23°C maximum temperature23
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 9 kph from the South9
    kph wind from S

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Koya weather for Sunday 21st September 2025

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 39% chance of some rain and a light breeze of 11 kph from the north.

  • 23°C maximum temperature23
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 39% chance of some rain39
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 23°C wind chill23
    °C wind chill
  • Light breeze of 11 kph from the North11
    kph wind from N

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Koya weather for Monday 22nd September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 8 kph from the North-East8
    kph wind from NE

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Metric (°C / mm)  |  Imperial (°F / inches)

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