Ulsan Weather in January
Ulsan in January sees low temperatures, with highs around 8°C (46°F) and overnight lows of -1°C (30°F). Around 35 mm (1.4 in) of snow/rainfall is typical, so a light rain jacket is a sensible addition to your bag.
Rainfall in Ulsan in January
Snow/rain is expected on roughly 6 days, totalling around 35 mm (1.4 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.
Temperature in Ulsan in January
If you're visiting Ulsan in January, expect highs of 8°C (46°F) and overnight lows around -1°C (30°F). The month of January belongs to the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows of -1°C (30°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. Since it's the coldest month of the year, you'll want to bundle up with extra layers and winter clothing.
Sunshine in Ulsan in January
The area experiences a moderate amount of sunshine, with approximately 188 hours of sunlight expected. This means a decent mix of sun and overcast.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Ulsan. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Ulsan's climate page.
Ulsan Temperature in January
Min Temperature
-1°C (30°F)
Max Temperature
8°C (46°F)
Chance of Rain
19%
Precipitation
35 mm (1.4 in)
Rainy days
6 days
Humidity
48%
Sunshine
188 hours
Percentage Sunshine
61%
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Ulsan typically stay consistent throughout January, with daily highs averaging around 8°C (46°F). Nights are very cold, with lows around -3°C (27°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Ulsan in January
Browse day-by-day weather records for Ulsan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ulsan historical weather extremes in January
The extremes listed below come from historical weather data collected in Ulsan from 1976 through 2025.
- The hottest January day on record in Ulsan reached 18°C (64°F) (January 12, 2002).
- On January 24, 2016, Ulsan saw its coldest January day with temperatures maxing out at -5°C (23°F).
- Nighttime temperatures dropped to -13°C (9°F) on January 25, 2023, marking the coldest January night on record.
Best Places in South Korea in January
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in January →
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What to Wear in Ulsan in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Pack a light rain jacket or compact umbrella for occasional showers. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Ulsan in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Ulsan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Ulsan climate overview or explore weather in South Korea.
