Best year time to visit On-ni

General weather information about On-ni

Average annual temperature is 13.6 °C

Absolute maximum temperature: 35.1 °C

Absolute minimum temperature: -14.4 °C

Number of sunny days: 186 days

Number of rainy days: 168 days

Number of snow days: 11 days

Look at detailed online map of On-ni

* Weather data for On-ni South Korea is based on climate observations for 2026 year

On-ni air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.912.125.327.631.235.133.834.930.522.923.517.7
Average daytime temperature (°C)3.66.715.219.024.628.329.530.626.619.811.35.8
Average temperature (°C)-1.01.38.613.018.722.625.726.322.515.07.22.0
Average night temperature (°C)-5.1-2.63.38.313.618.222.922.919.210.73.0-1.6
Absolute minimum temperature (°C)-14.4-5.8-2.91.85.714.820.517.913.35.3-5.5-13.0

On-ni monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.012.011.010.09.0
Daylight mean duration (h)10.010.812.013.114.114.614.413.512.411.310.29.7
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)7.28.19.47.98.59.97.58.87.28.46.84.7
Precipitation (mm)2711762106115415230244208288
Sunny days2125231520125610211612
Rainy days638151118262520101412
Snow days400000000007

On-ni - weather forecast by months

On-ni weather in januaryOn-ni weather in februaryOn-ni weather in marchOn-ni weather in aprilOn-ni weather in mayOn-ni weather in juneOn-ni weather in julyOn-ni weather in augustOn-ni weather in septemberOn-ni weather in octoberOn-ni weather in novemberOn-ni weather in december

Best time to visit On-ni:

The best time to visit On-ni during the most sunny months:

  • June — 9.9(h)

The largest precipitation sum in On-ni is at

  • July — 415(mm)
  • August — 230(mm)
  • September — 244(mm)

    • Weather forecast in the closest to On-ni admin centers

    Weather forecast in the closest towns to On-ni

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    Frequently asked questions

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