Weather in Ōshima in August

General weather information about Ōshima

Average annual temperature is 18.3 °C

Absolute maximum temperature: 28.9 °C

Absolute minimum temperature: 2.0 °C

Number of sunny days: 156 days

Number of rainy days: 208 days

Number of snow days: 1 day

Look at detailed online map of Ōshima

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

Ōshima air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)18.318.119.320.322.025.028.128.928.727.424.120.2
Average daytime temperature (°C)11.212.015.417.719.622.425.627.927.122.218.714.2
Average temperature (°C)9.610.314.116.318.621.624.927.026.120.717.012.5
Average night temperature (°C)7.78.212.114.317.420.724.125.824.918.915.110.6
Absolute minimum temperature (°C)2.04.27.210.813.317.922.023.021.416.010.25.4

Ōshima 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)10.110.912.013.114.014.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)6.27.17.48.88.97.210.710.99.28.67.57.6
Precipitation (mm)791302312312022594524729822115472
Sunny days91013131311221010111420
Rainy days21181817181992120201611
Snow days100000000000

Ōshima - weather forecast by months

Ōshima weather in januaryŌshima weather in februaryŌshima weather in marchŌshima weather in aprilŌshima weather in mayŌshima weather in juneŌshima weather in julyŌshima weather in augustŌshima weather in septemberŌshima weather in octoberŌshima weather in novemberŌshima weather in december

Best time to visit Ōshima:

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

  • July — 10.7(h)
  • August — 10.9(h)

The largest precipitation sum in Ōshima is at

  • March — 231(mm)
  • April — 231(mm)
  • June — 259(mm)
  • August — 247(mm)
  • September — 298(mm)

    • Weather forecast in the closest to Ōshima admin centers

    Weather forecast in the closest towns to Ōshima

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    Frequently asked questions

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