Best year time to visit Iwanai Chō

General weather information about Iwanai Chō

Average annual temperature is 8.7 °C

Absolute maximum temperature: 31.1 °C

Absolute minimum temperature: -13.8 °C

Number of sunny days: 84 days

Number of rainy days: 206 days

Number of snow days: 75 days

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

Iwanai Chō air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)5.66.714.317.922.126.928.331.126.620.617.59.2
Average daytime temperature (°C)-3.9-2.15.510.216.021.324.427.622.715.17.4-0.8
Average temperature (°C)-5.9-4.11.66.211.217.221.024.219.211.24.5-2.8
Average night temperature (°C)-7.8-6.2-1.63.07.013.818.221.616.37.91.8-5.1
Absolute minimum temperature (°C)-13.8-10.5-5.8-2.91.47.513.019.19.83.0-6.3-10.1

Iwanai Chō monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.410.511.913.414.715.315.013.912.511.09.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)5.35.88.08.110.710.09.69.57.87.65.03.4
Precipitation (mm)1341256910890156152198151230214196
Sunny days21146131111571031
Rainy days3413241819202623212213
Snow days262340000000517

Iwanai Chō - weather forecast by months

Iwanai Chō weather in januaryIwanai Chō weather in februaryIwanai Chō weather in marchIwanai Chō weather in aprilIwanai Chō weather in mayIwanai Chō weather in juneIwanai Chō weather in julyIwanai Chō weather in augustIwanai Chō weather in septemberIwanai Chō weather in octoberIwanai Chō weather in novemberIwanai Chō weather in december

Best time to visit Iwanai Chō:

The best time to visit Iwanai Chō during the most sunny months:

  • May — 10.7(h)
  • June — 10.0(h)
  • July — 9.6(h)

Months with the longest average daylight duration in Iwanai Chō:

  • June — 15.3(h)

The largest precipitation sum in Iwanai Chō is at

  • August — 198(mm)
  • October — 230(mm)
  • November — 214(mm)
  • December — 196(mm)

    • Weather forecast in the closest to Iwanai Chō admin centers

    Weather forecast in the closest towns to Iwanai Chō

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    Frequently asked questions

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