Will it rain today in Jeju?
Should you take an umbrella in Jeju? The forecast below loads live every time you open the page: rain now, when the next shower comes, and how much falls today and tomorrow.
Rain right now
No rain expected in Jeju for the rest of today. Tomorrow: 3.8 mm of rain.
As of 2026-10-16 17:35 UTC (NOAA GFS snapshot). Updating live…
Rain every 3 hours, today and tomorrow
Today · Saturday 17 October
Dry: no rain in the forecast.
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 00:00–03:00 | 0 | 0 | dry |
| 03:00–06:00 | 0 | 0 | dry |
| 06:00–09:00 | 0 | 0 | dry |
| 09:00–12:00 | 0 | 0 | dry |
| 12:00–15:00 | 0 | 0 | dry |
| 15:00–18:00 | 0 | 0 | dry |
| 18:00–21:00 | 0 | 0 | dry |
| 21:00–00:00 | 0 | 0 | dry |
Tomorrow · Sunday 18 October
3.8 mm of rain, 9 wet hours, up to 0.7 mm/h. (the forecast covers part of the day)
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 00:00–03:00 | 0.1 | 0 | dry |
| 03:00–06:00 | 0.1 | 0 | dry |
| 06:00–09:00 | 0.1 | 0 | dry |
| 09:00–12:00 | 0 | 0 | dry |
| 12:00–15:00 | 0.4 | 0.1 | light · rain |
| 15:00–18:00 | 1.3 | 0.4 | light · rain |
| 18:00–21:00 | 2.0 | 0.7 | light · rain |
Times in local time (Asia/Seoul). Each bar is the rain over 3 hours; striped bars are snow.
Rain map around Jeju
The same NOAA GFS precipitation on the map, moving hour by hour: blue light, darker heavy. Tap for the value.
How much it rains in Jeju, month by month
Jeju gets about 1,579 mm of rain a year. The wettest month is August (261 mm), the driest January (50 mm); a normal October brings 89 mm.
Average monthly rain and snow (water equivalent) 2001–2025, NASA POWER (MERRA-2 reanalysis, public domain), on a ~50 km grid: mountains and coasts can differ locally.
More for Jeju
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Questions
- Will it rain today in Jeju?
- At 17 October 2026 the forecast said: No rain expected in Jeju for the rest of today. Tomorrow: 3.8 mm of rain. The box at the top of the page loads the latest NOAA GFS forecast every time you open it, with the time the next rain starts.
- How much does it rain in Jeju?
- About 1,579 mm a year on average (2001–2025). August is the wettest month with 261 mm, January the driest with 50 mm.
- What do the rain amounts mean?
- 1 mm is a litre of water per square metre. Under 2.5 mm an hour is light rain (a drizzle to a steady rain), 2.5–7.6 moderate, above 7.6 heavy: you get soaked in minutes and streets can flood.
- How accurate is the forecast?
- It is the global NOAA GFS model on a 0.25° grid every 3 hours: good at telling a rainy day from a dry one, less at placing a single summer thunderstorm. Check the rain map for the showers moving around Jeju.
Rain forecast nearby
How this page works
The rain is the one the rain layer of the map paints: NOAA GFS forecast (public domain), precipitation rate averaged over 3 hours, read at Jeju and summed per local day. Rain or snow comes from the GFS precipitation type. The monthly normals are NASA POWER. No third-party weather service.