Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
Ulsan Weather in April
April in Ulsan brings pleasant temperatures, with highs of 19°C (66°F) and nights dropping to 8°C (46°F). Rainfall is on the higher side this month, averaging around 96 mm (3.8 in), so keep a rain jacket handy.
Rainfall in Ulsan in April
Looking at the last 30 years, the data shows about 10 days with rain, averaging 96 mm (3.8 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Ulsan in April
Daytime highs in Ulsan in April reach 19°C (66°F), with nights around 8°C (46°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 8°C (46°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Ulsan in April
With approximately 210 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.Our weather planner can help you find worldwide destinations with pleasant weather during this period. October typically offers the best weather for Ulsan.
Ulsan Temperature in April
Min Temperature
8°C (46°F)
Max Temperature
19°C (66°F)
Chance of Rain
33%
Precipitation
96 mm (3.8 in)
Rainy days
10 days
Humidity
60%
Sunshine
210 hours
Percentage Sunshine
53%
Ulsan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ulsan - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ulsan typically rise from around 17°C (63°F) at the start of April to approximately 21°C (70°F) by the end. Nights are cool, with lows typically ranging from 5°C (41°F) to 11°C (52°F).
Average temperatures in April
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in April
Historical weather records for Ulsan in April
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 April
Our historical data for Ulsan spans 1976 to 2026, revealing these weather extremes.
- Ulsan recorded its highest April temperature of 29°C (84°F) on April 18, 1993.
- The lowest daytime temperature in April was 9°C (48°F), recorded on April 1, 1987.
- Nighttime temperatures dropped to -2°C (28°F) on April 3, 1996, marking the coldest April night on record.
Best Places in South Korea in April
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 April →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ulsan in April
Comfortable temperatures call for an easy wardrobe in April. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Ulsan in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping4/10 -
Outdoor sports9/10
Ulsan 3-Day Forecast
More climate data for Ulsan
Temperature Rainfall Sunshine Humidity
See the full Ulsan climate overview or explore weather in South Korea.
Popular in April
Where to go in April - average daytime high across popular destinations.
Gyeongju
20°C (68°F) Jeonju19°C (66°F) Seoul19°C (66°F) Suwon19°C (66°F) Busan
18°C (64°F) Seogwipo18°C (64°F) Jeju16°C (61°F) Incheon16°C (61°F) Bucket list
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