Best year time to visit Kōyama

General weather information about Kōyama

Average annual temperature is 12.0 °C

Absolute maximum temperature: 29.9 °C

Absolute minimum temperature: -9.9 °C

Number of sunny days: 136 days

Number of rainy days: 225 days

Number of snow days: 4 days

Look at detailed online map of Kōyama

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

Kōyama air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)10.610.819.518.524.524.629.928.427.924.320.614.7
Average daytime temperature (°C)5.26.411.414.117.321.325.526.624.517.613.48.7
Average temperature (°C)0.82.37.410.413.517.821.622.520.813.39.23.9
Average night temperature (°C)-3.0-1.33.97.110.215.118.719.818.09.55.80.0
Absolute minimum temperature (°C)-9.9-6.2-3.30.24.611.915.517.713.06.0-1.6-8.5

Kōyama monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.09.0
Daylight mean duration (h)10.110.912.013.114.014.514.313.512.411.310.39.8
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.09.09.0
Sunshine mean duration (h)6.96.67.78.38.26.89.410.59.28.77.47.3
Precipitation (mm)41111217268317647164221202160121100
Sunny days151211101171047141520
Rainy days141420202023212723171511
Snow days220000000000

Kōyama - weather forecast by months

Kōyama weather in januaryKōyama weather in februaryKōyama weather in marchKōyama weather in aprilKōyama weather in mayKōyama weather in juneKōyama weather in julyKōyama weather in augustKōyama weather in septemberKōyama weather in octoberKōyama weather in novemberKōyama weather in december

Best time to visit Kōyama:

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

  • August — 10.5(h)

The largest precipitation sum in Kōyama is at

  • May — 317(mm)
  • June — 647(mm)

    • Weather forecast in the closest to Kōyama admin centers

    Weather forecast in the closest towns to Kōyama

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    Frequently asked questions

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