Best year time to visit Kōyasan

General weather information about Kōyasan

Average annual temperature is 13.2 °C

Absolute maximum temperature: 32.4 °C

Absolute minimum temperature: -11.1 °C

Number of sunny days: 113 days

Number of rainy days: 234 days

Number of snow days: 18 days

Look at detailed online map of Kōyasan

* Weather data for Kōyasan Japan is based on climate observations for 2026 year

Kōyasan air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)14.415.421.525.526.829.031.932.431.523.322.717.9
Average daytime temperature (°C)4.66.413.616.920.523.729.429.427.418.714.09.0
Average temperature (°C)0.72.18.511.515.619.824.524.822.613.89.44.6
Average night temperature (°C)-3.0-1.54.37.211.716.520.821.719.210.25.81.1
Absolute minimum temperature (°C)-11.1-6.8-2.52.35.610.217.719.015.25.9-0.3-4.7

Kōyasan monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.211.012.013.013.914.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)6.76.68.38.18.66.910.49.59.88.67.26.6
Precipitation (mm)10063121192230430552287014012883
Sunny days810169131010171397
Rainy days131415211820213023182120
Snow days1040000000004

Kōyasan - weather forecast by months

Kōyasan weather in januaryKōyasan weather in februaryKōyasan weather in marchKōyasan weather in aprilKōyasan weather in mayKōyasan weather in juneKōyasan weather in julyKōyasan weather in augustKōyasan weather in septemberKōyasan weather in octoberKōyasan weather in novemberKōyasan weather in december

Best time to visit Kōyasan:

The best time to visit Kōyasan during the most sunny months:

  • July — 10.4(h)

The largest precipitation sum in Kōyasan is at

  • May — 230(mm)
  • June — 430(mm)
  • August — 228(mm)

    • Weather forecast in the closest to Kōyasan admin centers

    Weather forecast in the closest towns to Kōyasan

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    Frequently asked questions

    When is the best time to visit Kōyasan?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Kōyasan.
    What is the weather like in Kōyasan?
    See average temperature, rainfall and daylight hours for Kōyasan by month in the table above.
    How many sunny days does Kōyasan have?
    The monthly weather statistics above show sunshine and rainfall patterns for Kōyasan throughout the year.