Will it rain in
Seoul today?
Live hourly rain forecast and run verdict for Seoul, Seoul, South Korea.
Running in Seoul means navigating South Korea's extreme seasons — frozen winters, monsoon summers, and yellow dust in spring. Whether it's a sub-zero run along the Han River, a summer monsoon flooding the Cheonggyecheon, or a dusty spring morning requiring a mask, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in Seoul right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever Seoul's four extreme seasons are throwing at you today.
What to wear
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How often does it rain in Seoul?
Seoul records around 1237mm of rain a year, spread across about 98 days — roughly 27% of all days, or 8 days in an average month. That puts Seoul mid-pack: rain interrupts roughly one run in three, so it pays to check the hourly forecast before a long run, but you will not be running in waterproofs week after week.
The wettest month is July, averaging 310mm across about 18 rainy days. The driest is January, with 18mm over roughly 3 days. Average lows in January drop to -6.6°C, cold enough that gloves, a headband and a thermal base layer make a real difference on early runs. At the other end, August averages 29.2°C highs — hot enough that early morning and evening are the sensible windows, and hydration matters more than waterproofing.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 18mm | 3 | 2°C | -6.6°C |
| February | 26mm | 4 | 5°C | -4.8°C |
| March | 40mm | 6 | 11.5°C | 0°C |
| April | 64mm | 7 | 17.7°C | 6.4°C |
| May | 106mm | 8 | 22.8°C | 11.7°C |
| June | 121mm | 10 | 26.9°C | 17.5°C |
| July | 310mm | 18 | 28.8°C | 22°C |
| August | 260mm | 16 | 29.2°C | 22.5°C |
| September | 131mm | 9 | 25.3°C | 17.1°C |
| October | 76mm | 6 | 18.6°C | 9.2°C |
| November | 59mm | 7 | 11.2°C | 1.9°C |
| December | 26mm | 4 | 3.2°C | -5.2°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in Seoul: common questions
Will it rain in Seoul today?
The forecast card at the top of this page shows Seoul's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, Seoul sees rain on about 98 days a year, so on any given day there is roughly a 27% chance of some rain falling.
Is it a good day to run in Seoul?
RainOrRun scores the live Seoul forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in Seoul today?
The hourly strip above highlights the best single window of the day for Seoul — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in Seoul today?
The gear section on this page updates with the live Seoul forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in Seoul?
July is the wettest month in Seoul, averaging 310mm of rain across about 18 rainy days. January is the driest, with around 18mm over roughly 3 days. Figures are ten-year averages covering 2015 to 2024.
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