10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Mainly clear
10°
Feels like 10°
Wind↑ N 7 km/h
Humidity 61 %
Afternoon
Clear sky
14°
Feels like 14°
Wind↑ NE 12 km/h
Humidity 52 %
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
12°
Feels like 12°
Wind↑ ESE 6 km/h
Humidity 60 %
Afternoon
Clear sky
17°
Feels like 17°
Wind↑ NNE 10 km/h
Humidity 55 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Partly cloudy
14°
Feels like 14°
Wind↑ SE 4 km/h
Humidity 70 %
Afternoon
Clear sky
18°
Feels like 18°
Wind↑ NNE 12 km/h
Humidity 62 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Overcast
16°
Feels like 16°
Wind↑ ESE 5 km/h
Humidity 66 %
Afternoon
Overcast
18°
Feels like 18°
Wind↑ ESE 7 km/h
Humidity 66 %
💧 0.1 mm
Jeju City forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Jeju City climate: what a normal year looks like
The hottest stretch is August, when afternoons average 29 °C; the coldest is January, when nights average 4 °C. Between those two months the average temperature changes by 21 °C.
A normal year brings roughly 1,600 mm of rain — more than 79% of the towns of 20,000+ people we compared it with.
From 14 h 22 min of daylight in late June to 9 h 55 min in late December.
Afternoons climb to 25 °C only from July to September, with a typical peak of 29 °C in August.
Forecast highs for the coming week average 19 °C, 2 °C cooler than a normal October (21 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
8 °C
4 °C
64 mm
Feb
9 °C
4 °C
66 mm
Mar
11 °C
7 °C
102 mm
Apr
16 °C
11 °C
124 mm
May
20 °C
15 °C
134 mm
Jun
23 °C
19 °C
238 mm
Jul
27 °C
23 °C
235 mm
Aug
29 °C
25 °C
233 mm
Sep
25 °C
21 °C
189 mm
Oct
21 °C
16 °C
89 mm
Nov
16 °C
11 °C
68 mm
Dec
10 °C
6 °C
61 mm
Whole year
18 °C
14 °C
1,600 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 33.51° N, 126.52° E, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Jeju City: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.53µg/m³
PM105µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Jeju City
Rain observed over the last two hours by official weather radars around Jeju City, followed by the radar forecast for the next hour where the weather service provides one.
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Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Jeju City yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Jeju City
Waning gibbous
79 % illuminated · 19.3 days
Rise 16:01 Set 06:16
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Wed11/113%
Moonrise and moonset in local time (Asia/Seoul); phase and lit fraction from a synodic calculation.
Look up a past day in Jeju City
Curious about the weather in Jeju City on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Jeju City weather at a glance
This page gathers everything about the weather in Jeju City, Jeju-do: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “light rain”, it is 17 °C (feels like 17 °C) and the wind blows at 26 km/h.
Expected range today: 15 °C to 19 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Jeju City forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
