Best year time to visit Iwaonai

General weather information about Iwaonai

Average annual temperature is 6.8 °C

Absolute maximum temperature: 31.4 °C

Absolute minimum temperature: -19.3 °C

Number of sunny days: 79 days

Number of rainy days: 202 days

Number of snow days: 84 days

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

Iwaonai air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)3.74.411.415.322.727.229.031.426.419.415.89.4
Average daytime temperature (°C)-7.3-5.13.98.915.921.224.326.321.713.15.5-3.2
Average temperature (°C)-9.8-7.90.34.810.716.520.422.317.89.22.1-6.0
Average night temperature (°C)-12.4-10.6-2.51.66.412.817.419.514.56.4-0.8-9.0
Absolute minimum temperature (°C)-18.6-19.0-9.4-5.3-1.23.89.715.49.2-0.3-11.2-19.3

Iwaonai 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)9.310.511.913.514.815.415.114.012.511.09.78.9
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)5.75.88.27.710.19.89.39.08.57.44.83.3
Precipitation (mm)67807915486154129255179140203109
Sunny days2113312867111321
Rainy days2613261922252419181810
Snow days2721510000001020

Iwaonai - weather forecast by months

Iwaonai weather in januaryIwaonai weather in februaryIwaonai weather in marchIwaonai weather in aprilIwaonai weather in mayIwaonai weather in juneIwaonai weather in julyIwaonai weather in augustIwaonai weather in septemberIwaonai weather in octoberIwaonai weather in novemberIwaonai weather in december

Best time to visit Iwaonai:

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

  • May — 10.1(h)
  • June — 9.8(h)

Months with the longest average daylight duration in Iwaonai:

  • June — 15.4(h)

The largest precipitation sum in Iwaonai is at

  • August — 255(mm)
  • September — 179(mm)
  • November — 203(mm)

    • Weather forecast in the closest to Iwaonai admin centers

    Weather forecast in the closest towns to Iwaonai

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    Frequently asked questions

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