See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
24°
Mostly Clear
Feels Like: 24°
Min: 19°
Max: 26°
The next few hours will be mostly cloudy, with today reaching 26°C and dropping to 18°C. The coming days will be mostly clear starting in the afternoon.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:11
Sunrise
18:22
Sunset
Moon
Waxing Crescent
11:10
Moonrise
20:59
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Ulsan.
Resources
UV Index
Humidity
Weather in Ulsan today, September 16, 2026
Ulsan sees a largely clear day on September 16, 2026, interrupted by cloudier skies around 23:00. Plan for bright conditions either side of that cloudier interval.
Expect highs of 26°C and cooler readings close to 19°C. The air stays humid, with relative humidity between 54% and 83% and the peak around 23:00. Winds stay light, near 4.2 km/h by 16:00, so the day feels still more than breezy.
Afternoon conditions open up, holding cloud close to 45% near 23:00. The day finishes on a milder, brighter note. Horizontal visibility holds close to 16.1 km. Daylight runs from 06:11 to 18:22, lasting 12 hours 10 minutes of sunlight today.
In short, September 16, 2026 looks like a fine day in Ulsan for being outside, peaking around 26°C.
Frequently asked questions about weather in Ulsan
How warm does it get in Ulsan?
The warmest month in Ulsan is August, with average high temperatures of 30°C. The average temperature during this period is around 27°C.
How cold does it get in Ulsan?
The coldest month in Ulsan is January, with average low temperatures of -1°C. The average temperature during this period is around 3°C.
What is the wettest time of year in Ulsan?
The wettest month in Ulsan is September, with an average of 234mm of precipitation.
What is the driest time of year in Ulsan?
The driest month in Ulsan is December, with an average of 28mm of precipitation.
