Weather in Ulsan — today
Now in Ulsan
☀️
+26°
Clear
Feels like +28° · humidity 73%
Today 12.9: +27° / +18°
🕐 16:25
Wind
14 km/h
UV index
3
Air (AQI)
46 · Moderate
Precipitation
2%
Humidity
73%
Pressure
1020 hPa
Sunrise / sunset
06:02 / 18:34
Sea temperature
🌊 +26°
👕 What to wear today
Warm — a T-shirt and light trousers or shorts.
Feels warmer by 2°
Weather for an activity:
Detailed weather information for Ulsan
Today, 12 September, Saturday, in Ulsan (South Korea): partly cloudy, warm. During the day the air will warm up to +27°, at night around +18°. Wind up to 15 km/h. No precipitation expected, you won't need an umbrella. Light summer clothing will do — a T-shirt and shorts or light trousers. The sea has warmed up to +26° — great for swimming. The sun will rise at 06:02 and set at 18:34 — daylight lasts 13 hours.Hourly weather in Ulsan
💧 No precipitation expected on this day. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Ulsan for 14 days
Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).
▶
Today 12.9
⛅
💧 2%
+18° +27°
Morning
⛅
+21°
Day
⛅
+27°
Evening
🌇
+25°
Night
🌙
+18°
▶
Tomorrow 13.9
⛅
+19° +29°
Morning
☀️
+22°
Day
⛅
+29°
Evening
🌇
+24°
Night
🌙
+19°
▶
Mon 14.9
🌦️
💧 6%
+19° +24°
Morning
🌦️
+21°
Day
🌦️
+24°
Evening
🌇
+23°
Night
🌙
+19°
▶
Tue 15.9
🌧️
💧 33%
+18° +26°
Morning
🌧️
+21°
Day
🌧️
+26°
Evening
🌇
+24°
Night
🌙
+18°
▶
Wed 16.9
🌦️
💧 10%
+18° +27°
Morning
🌦️
+21°
Day
🌦️
+27°
Evening
🌇
+25°
Night
🌙
+18°
▶
Thu 17.9
☁️
💧 3%
+19° +26°
Morning
☁️
+22°
Day
☁️
+26°
Evening
🌇
+24°
Night
🌙
+19°
▶
Fri 18.9
🌦️
💧 49%
+20° +23°
Morning
🌦️
+21°
Day
🌦️
+23°
Evening
🌇
+22°
Night
🌙
+20°
▶
Sat 19.9
🌦️
💧 41%
+20° +25°
Morning
🌦️
+22°
Day
🌦️
+25°
Evening
🌇
+24°
Night
🌙
+20°
▶
Sun 20.9
☁️
💧 18%
+21° +24°
Morning
☁️
+22°
Day
☁️
+24°
Evening
🌇
+23°
Night
🌙
+21°
▶
Mon 21.9
🌦️
💧 33%
+23° +27°
Morning
🌦️
+24°
Day
🌦️
+27°
Evening
🌇
+26°
Night
🌙
+23°
▶
Tue 22.9
⛈️
💧 46%
+22° +27°
Morning
⛈️
+24°
Day
⛈️
+27°
Evening
🌇
+26°
Night
🌙
+22°
▶
Wed 23.9
⛈️
💧 43%
+18° +27°
Morning
⛈️
+21°
Day
⛈️
+27°
Evening
🌇
+25°
Night
🌙
+18°
▶
Thu 24.9
🌦️
💧 26%
+17° +23°
Morning
🌦️
+19°
Day
🌦️
+23°
Evening
🌇
+22°
Night
🌙
+17°
▶
Fri 25.9
☁️
💧 12%
+15° +22°
Morning
☁️
+18°
Day
☁️
+22°
Evening
🌇
+20°
Night
🌙
+15°
🗺️ Precipitation radar
Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.
Rain intensity:lightmoderateheavy
🎯 What to do in this weather — indices of the day
Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.
🏖️ Beach
88 / 100
for sea and sun · Excellent
🏊 Swimming
98 / 100
water 26° · Excellent
🏃 Running
68 / 100
comfort for running · Good
🧴 UV
27%
moderate · low
☂️ Rain
2%
unlikely · low
✨ Stars
87 / 100
evening visibility · Excellent
🧺 Laundry drying
64 / 100
will dry outside · Average
🚗 Car wash
93 / 100
no rain expected · Excellent
🌫️ Air quality
46
Moderate air
European AQI
PM2.5: 11PM10: 16O₃: 106NO₂: 7
Moderate. Those sensitive to dust should be more careful during long outdoor exercise.
🌅 Sun, moon and sea
Sunrise
06:02
Sunset
18:34
Golden hour
18:00
Daylight
13 h (-2 min vs yesterday)
Sea temperature
+26°
🌊 slight, waves 0.5 m.
Ulsan climate by month
Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.
+6°
-1°
Jan
+8°
+0°
Feb
+12°
+3°
Mar
+17°
+8°
Apr
+22°
+13°
May
+25°
+17°
Jun
+27°
+22°
Jul
+28°
+23°
Aug
+25°
+19°
Sep
+20°
+13°
Oct
+14°
+6°
Nov
+8°
+0°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Sea | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|---|
| January | +6° | -1° | +12° | 32 mm | A cold month: +6° by day, long walks get uncomfortable. 🧣 a warmer jacket. The water is cold (+12°) — swimming is for the brave. This is the coldest month of the year. |
| February | +8° | +0° | +12° | 39 mm | Cold: +8° by day, down to +0° at night — dress warmly. 🧥 a warm jacket. The water is cold (+12°) — swimming is for the brave. |
| March | +12° | +3° | +13° | 71 mm | A fresh month — +12° daytime, take a jacket for walks. Frequent rain (71 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. The water is cold (+13°) — swimming is for the brave. |
| April | +17° | +8° | +14° | 91 mm | Cool weather: +17° by day, noticeably colder in the evening. One of the wettest months (91 mm): downpours can derail plans. 🙂 a sweater for the evening. The water is cold (+14°) — swimming is for the brave. |
| May | +22° | +13° | +16° | 101 mm | One of the best times to visit: +22° by day, fresh nights. It's a rainy month (101 mm) — an umbrella is a must. 🙂 a sweater for the evening. The water is cold (+16°) — swimming is for the brave. Weather-wise, one of the three best months to visit. |
| June | +25° | +17° | +19° | 148 mm | Ideal weather: +25° daytime — neither hot nor cold. Frequent rain (148 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Sea at +19° — swimmable, refreshing. The longest daylight hours of the year — more time for everything. |
| July | +27° | +22° | +20° | 225 mm | A comfortable month: +27° by day without exhausting heat. One of the wettest months (225 mm): downpours can derail plans. 😊 light summer clothing. Sea at +20° — swimmable, refreshing. Statistically the wettest month of the year. |
| August | +28° | +23° | +26° | 214 mm | Warm and comfortable: +28° by day, +23° at night. It's a rainy month (214 mm) — an umbrella is a must. 😊 light summer clothing. Water at +26° — great for swimming. This is the hottest month of the year in Ulsan. |
| September | +25° | +19° | +26° | 175 mm | Ideal weather: +25° daytime — neither hot nor cold. Frequent rain (175 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Water at +26° — great for swimming. |
| October | +20° | +13° | +22° | 74 mm | The most pleasant season: +20° by day, comfortable all day long. One of the wettest months (74 mm): downpours can derail plans. 🙂 a sweater for the evening. Water at +22° — great for swimming. Weather-wise, one of the three best months to visit. |
| November | +14° | +6° | +18° | 48 mm | Cool: around +14° by day, you'll need a warm layer. 🧥 a warm jacket. Sea at +18° — swimmable, refreshing. |
| December | +8° | +0° | +14° | 28 mm | Winter weather: about +8° daytime, you need a warm coat and hat. 🧥 a warm jacket. The water is cold (+14°) — swimming is for the brave. The shortest daylight of the year — it gets dark early. |
When to visit Ulsan
✅ Recommended time to visit
🌟 Best time: May, June, October
Daytime air+20…+25°
Sea temperature+16…+22°
Precipitationoften
Why: comfortable +20…+25° by day, little rain.
⚠️ Doable, with caveats
🌤️ Shoulder season: January, April, July, August, September, November
Daytime air+6…+28°
Sea temperature+12…+26°
Precipitationoften
Why: noticeable rain risk (32–225 mm/month) — pack an umbrella and backup plans.
🔴 Not the best time
❄️ Cold season: February, March, December
Daytime air+8…+12°
Sea temperature+12…+14°
Precipitationoften
Why: cold and dark (+8…+12° by day, 10 h of daylight) — only if frost and short days don’t put you off.
Bottom line: the best time to visit Ulsan is May, June, October, and the most comfortable months are May, June, October. The toughest months to visit are February, March, December: cool and damp.
🌡️ Today vs the climate normal
Today's high
+27°
Normal for September
+25°
Deviation
2° warmer than normal
A year ago on this day
+26°
Record for this date
+30° (2010)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Ulsan
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
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Weather in cities near Ulsan
Frequently asked questions about the weather in Ulsan
What is the weather in Ulsan right now?＋
Clear, +26°, feels like +28°.
Will it rain in Ulsan today?＋
No: 2% chance, 0 mm.
When is the best time to visit Ulsan?＋
Best time to visit — May, June, October.
Can you swim in Ulsan in summer?＋
In winter the water is around +13° — swimming is for the brave. In summer the sea warms up to +22°.
What time are sunrise and sunset in Ulsan?＋
Sunrise 06:02, sunset 18:34.
Does it snow in Ulsan in winter?＋
Yes, snow is possible in January, February.
What is the climate in Ulsan by month?＋
Summers up to +28° in August, winters around -1° in January; the wettest month is July.
Is it cold in Ulsan in winter?＋
🧣 Cool. Take a warmer jacket.