10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
4°
Feels like 2°
Wind↑ WNW 6 km/h
Humidity 49 %
Afternoon
Clear sky
16°
Feels like 16°
Wind↑ N 3 km/h
Gusts9 km/h
Humidity 42 %
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
7°
Feels like 6°
Wind↑ WNW 6 km/h
Humidity 76 %
Afternoon
Mainly clear
18°
Feels like 18°
Wind↑ WSW 2 km/h
Humidity 44 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
9°
Feels like 8°
Wind↑ WNW 6 km/h
Humidity 77 %
Afternoon
Partly cloudy
19°
Feels like 19°
Wind↑ ESE 5 km/h
Humidity 48 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
10°
Feels like 10°
Wind↑ NW 5 km/h
Humidity 75 %
Afternoon
Mainly clear
18°
Feels like 18°
Wind↑ E 9 km/h
Humidity 55 %
Ulsan 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)
Ulsan climate: what a normal year looks like
The hottest stretch is August, when afternoons average 29 °C; the coldest is January, when nights average −2 °C. Between those two months the average temperature changes by 24 °C.
Nights typically freeze in December and January, the coldest averaging −2 °C in January.
From 14 h 33 min of daylight in late June to 9 h 45 min in late December.
Forecast highs for the coming week average 18 °C, 3 °C cooler than a normal October (21 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
7 °C
−2 °C
33 mm
Feb
9 °C
0 °C
40 mm
Mar
13 °C
4 °C
72 mm
Apr
19 °C
8 °C
92 mm
May
23 °C
14 °C
99 mm
Jun
25 °C
18 °C
149 mm
Jul
28 °C
22 °C
216 mm
Aug
29 °C
24 °C
219 mm
Sep
26 °C
19 °C
174 mm
Oct
21 °C
13 °C
75 mm
Nov
16 °C
6 °C
47 mm
Dec
9 °C
0 °C
28 mm
Whole year
19 °C
10 °C
1,240 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 35.54° N, 129.32° 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 Ulsan: pollution and pollen
2/6
Fair
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.510µg/m³
PM1011µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Ulsan
Rain observed over the last two hours by official weather radars around Ulsan, 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 Ulsan yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Ulsan
Waning gibbous
79 % illuminated · 19.3 days
Rise 15:42 Set 06:11
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 Ulsan
Curious about the weather in Ulsan on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Ulsan weather at a glance
This page gathers everything about the weather in Ulsan, Ulsan: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “overcast”, it is 12 °C (feels like 12 °C) and the wind blows at 6 km/h.
Expected range today: 9 °C to 21 °C and around 2 mm of rain. 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 Ulsan 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.
