Koya weather live forecast

Today's maximum temperature in Koya is expected to be 12°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 Tuesday 21st October 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 Tuesday 21st October 2025

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 66% chance of some rain and a light breeze of 8 kph from the north-east.

  • 12°C maximum temperature12
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 66% chance of some rain66
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Light breeze of 8 kph from the North-East8
    kph wind from NE

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Koya weather for Wednesday 22nd October 2025

Expect overcast with light rain in Koya, Japan with a maximum temperature of 10°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 88% chance of some rain and little or no wind of 6 kph from the north-east.

  • 10°C maximum temperature10
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Overcast with light rain
    overcast with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 88% chance of some rain88
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 9°C wind chill9
    °C wind chill
  • Little or no wind of 6 kph from the North-East6
    kph wind from NE

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Koya weather for Thursday 23rd October 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 15°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north-east.

  • 15°C maximum temperature15
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 5 kph from the North-East5
    kph wind from NE

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Koya weather for Friday 24th October 2025

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 27% chance of some rain and little or no wind of 5 kph from the east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 27% chance of some rain27
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 16°C wind chill16
    °C wind chill
  • Little or no wind of 5 kph from the East5
    kph wind from E

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Koya weather for Saturday 25th October 2025

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 16°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 40-50 mm of rainfall expected with 60% chance of some rain and little or no wind of 6 kph from the south-east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 60% chance of some rain60
    % chance of some rain
  • 40-50 mm of rainfall expected<50
    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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Metric (°C / mm)  |  Imperial (°F / inches)

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