Weather in Isō in May

General weather information about Isō

Average annual temperature is 15.1 °C

Absolute maximum temperature: 36.1 °C

Absolute minimum temperature: -11.4 °C

Number of sunny days: 140 days

Number of rainy days: 217 days

Number of snow days: 8 days

Look at detailed online map of Isō

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

Isō air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)15.315.323.324.728.430.235.536.133.626.825.519.5
Average daytime temperature (°C)7.98.715.617.822.025.831.032.829.721.316.311.3
Average temperature (°C)2.84.39.812.717.021.226.227.725.016.311.56.5
Average night temperature (°C)-1.40.64.98.612.917.622.824.321.712.37.92.8
Absolute minimum temperature (°C)-11.4-4.0-2.40.86.311.119.822.616.76.30.4-3.6

Isō 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)6.46.28.37.49.06.99.210.29.28.97.36.7
Precipitation (mm)5750104238249239104194976111941
Sunny days871815179819131718
Rainy days201613151421233021181313
Snow days350000000000

Isō - weather forecast by months

Isō weather in januaryIsō weather in februaryIsō weather in marchIsō weather in aprilIsō weather in mayIsō weather in juneIsō weather in julyIsō weather in augustIsō weather in septemberIsō weather in octoberIsō weather in novemberIsō weather in december

Best time to visit Isō:

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

  • August — 10.2(h)

The largest precipitation sum in Isō is at

  • April — 238(mm)
  • May — 249(mm)
  • June — 239(mm)
  • August — 194(mm)

    • Weather forecast in the closest to Isō admin centers

    Weather forecast in the closest towns to Isō

    Explore Isō

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    MapTrains schedule
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    Frequently asked questions

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