Koya weather live forecast

Today's maximum temperature in Koya is expected to be 22°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

5-day weather forecast updated at 04:04 on Friday 5th 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 Friday 5th September 2025

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 40-50 mm of rainfall expected with 99% chance of some rain and a light breeze of 11 kph from the north-west.

  • 22°C maximum temperature22
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 99% chance of some rain99
    % chance of some rain
  • 40-50 mm of rainfall expected<50
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Koya weather for Saturday 6th September 2025

Expect scattered clouds in Koya, Japan with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.

  • 26°C maximum temperature26
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 8 kph from the North8
    kph wind from N

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Koya weather for Sunday 7th September 2025

Expect scattered clouds in Koya, Japan with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north-west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 7 kph from the North-West7
    kph wind from NW

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Koya weather for Monday 8th September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 9 kph from the North-West9
    kph wind from NW

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Koya weather for Tuesday 9th September 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south-west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Little or no wind of 6 kph from the South-West6
    kph wind from SW

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