Expand
Contents
- The climate of Ulsan
- The best time to visit Ulsan
- The worst time to visit Ulsan
- Spring weather in Ulsan
- Summer weather in Ulsan
- Autumn weather in Ulsan
- Winter weather in Ulsan
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Ulsan
Ulsan city, situated in South Korea, experiences a dominantly Humid subtropical climate, categorized as Cfa in the widely used Köppen climate classification system. Ulsan witnesses variations across temperatures, moisture levels, and precipitation throughout the year, without a recognized dry season.
Throughout the year, average high temperatures range from 4.8°C (40.6°F) in January to a peak of 28°C (82.4°F) in August, suggesting a noted warming trend that starts in the early months. A similar pattern is observed in low temperatures swinging from -1.3°C (29.7°F) in January to a remarkable 23.3°C (73.9°F) in August.
Relative Humidity also fluctuates over the course of a year, with a percentage low in the 60s during the early months climbing to 86% by July before receding. Ulsan is not immune to generous rainfall amounts, marking its presence all year round. The city receives the least precipitation in January with 30mm (1.18") and peaks at 180mm (7.09") in July. Notably, the highest frequency of rainy days occurs in July and the lowest in January.
A unique climatic feature is the almost complete absence of snowfall from April to November, with only minimal amounts in the remaining months. Daylight hours are found to be maximum in July at 14.5 hours, then declining slowly towards the yearly low of 9.8 hours in December.
Throughout the year, average high temperatures range from 4.8°C (40.6°F) in January to a peak of 28°C (82.4°F) in August, suggesting a noted warming trend that starts in the early months. A similar pattern is observed in low temperatures swinging from -1.3°C (29.7°F) in January to a remarkable 23.3°C (73.9°F) in August.
Relative Humidity also fluctuates over the course of a year, with a percentage low in the 60s during the early months climbing to 86% by July before receding. Ulsan is not immune to generous rainfall amounts, marking its presence all year round. The city receives the least precipitation in January with 30mm (1.18") and peaks at 180mm (7.09") in July. Notably, the highest frequency of rainy days occurs in July and the lowest in January.
A unique climatic feature is the almost complete absence of snowfall from April to November, with only minimal amounts in the remaining months. Daylight hours are found to be maximum in July at 14.5 hours, then declining slowly towards the yearly low of 9.8 hours in December.
The best time to visit Ulsan
The optimal time to visit Ulsan falls between April and June. During these months, the city experiences warm temperatures, ranging from a low of 9°C (48.2°F) in April to a high of 23.4°C (74.1°F) in June. The relative low humidity, starting from 68% in April and building up to 80% by June, pairs well with the comfortable temperatures to offer an enjoyable environment. Rainfall during these months is relatively scanty, but June sees an increase to 97mm (3.82"), signaling the oncoming of a wetter season.
The worst time to visit Ulsan
The period from July to August can be considered less favorable for a visit, attributed to the high humidity levels reaching up to 86% in July and staying high at 82% in August. Temperatures also reach their highest, climbing up to 28°C (82.4°F) in August. Furthermore, this time is associated with the year’s highest rainfall - from 180mm (7.09") in July to 120mm (4.72") in August, creating conditions that may not be preferable for outdoor tourist activities.
Spring weather in Ulsan
The advent of spring is marked by rising temperatures, starting with lows of 1.1°C (34°F) in February to highs of 15.8°C (60.4°F) in April. A corresponding increase in relative humidity from 62% to 68% is also observed. Rainfall increases progressively from 35mm (1.38") in February to 81mm (3.19") in April. Despite the showers, the daylight hour extends from 10.9 hours in February to 13.1 hours in April, making Ulsan pleasantly warm for outdoor excursions.
Summer weather in Ulsan
Summer in Ulsan is characterized by elevated temperatures - from 20.5°C (68.9°F) in May peaking at 28°C (82.4°F) in August. The humidity levels are on the rise too, with the maximum being observed in July at 86%. This is also the wettest period, with rainfall peaking at a hefty 180mm (7.09") in July. Despite the high rainfall, daylight hours remain over 14 for May and June, slightly decreasing to 13.5 in August.
Autumn weather in Ulsan
In Autumn, temperatures in Ulsan start to dip from the highs of 23.8°C (74.8°F) in September to a comfortable 13.5°C (56.3°F) by November. Humidity too declines, averaging 72% in September and dropping down to 67% toward November. While September and October witness significant rainfall of 124mm (4.88") and 76mm (2.99") respectively, November experiences a relative dry spell with 28mm (1.1").
Winter weather in Ulsan
Winter descends on Ulsan with temperatures dropping down to a chilly low of -1.3°C (29.7°F) in January. Highs reach only 6.7°C (44.1°F) in December and 4.8°C (40.6°F) in January, with February seeing a slight increase to 7.2°C (45°F). The relative humidity fluctuates between 62% and 60% from December through February. These months register the lowest precipitation, ranging from 29mm (1.14") in December to a low of 30mm (1.18") in January. Despite the low temperatures, Ulsan experiences relatively little snowfall, under 13mm (0.51") during the entire winter season.
Weather in January
Ulsan, South Korea, greets the new year with cold temperatures and snowfall. This month records the coldest of the year with maximum and minimum average temperatures settling at is 4.8°C (40.6°F) and -1.3°C (29.7°F) respectively. Weather in January »
Weather in February
The city of Ulsan undergoes a slight increase in temperatures in February, indicating a transition from severe winter to a gentler one. This month records an increase in snowfall with 13mm (0.51") covering the city. It also brings a noticeable rise in the number of rainy days and the amount of rainfall than January. Weather in February »
Weather in March
Welcoming the onset of spring, Ulsan experiences a significant rise in temperatures in March. The amount of snowfall declines significantly this month, dropping to 6mm (0.24"). Along with the warmth, March brings a sharp increase in daylight hours and solar exposure, which significantly impacts the daily routines and outdoor activities of residents. Weather in March »
Weather in April
Complete transformation from the harsh winter is seen in Ulsan's weather in April. The city records its first snow-free month. It's also the time when the amount of rainfall and the number of rainy days reach a yearly high, with 81mm (3.19") falling over 11.3 days. Weather in April »
Weather in May
May signifies the commencement of the warm season in Ulsan, with temperatures reaching 20.5°C (68.9°F) on average. Despite the increase in temperature, the city records a substantial decrease in rainfall to only 53mm (2.09"). Sunlight hours extend and air pressure falls, indicating the arrival of summer. Weather in May »
Weather in June
June is another step towards the sweltering summer for Ulsan with an average high temperature of 23.4°C (74.1°F). However, June also brings the highest amount of rainfall, 97mm (3.82"), for the city, indicating the onset of the rainy season. Weather in June »
Weather in July
The peak of summer arrives in Ulsan in July with the highest maximum temperatures reaching up to 26.4°C (79.5°F). Ironically, this month also witnesses the peak of the rainy season with a whopping 180mm (7.09") of rainfall. High moisture content in the atmosphere leads to an increase in relative humidity, making the heat feel more oppressive. Weather in July »
Weather in August
August continues the summer's legacy in Ulsan with an increase in the highest average temperature, marking 28°C (82.4°F). Rainfall decreases to 120mm (4.72"), providing respite to the residents from the heavy downpours of July. Weather in August »
Weather in September
September brings a transition from summer to autumn in Ulsan. There's a considerable dip in the high temperature, averaging out around 23.8°C (74.8°F). The city receives a significant amount of rainfall, precisely 124mm (4.88"). Weather in September »
Weather in October
October portrays a significant cooling trend as Ulsan moves deeper into autumn. The absence of rain is noted with a reduction to just 76mm (2.99") of rainfall. Pressure trends show an increase, and the wind speed also elevates, making the atmosphere crisp and fresh. Weather in October »
Weather in November
November witnesses a further fall in temperature levels in Ulsan, indicating the approach of the winter season. Rainfall marks the lowest levels of the year, with only 28mm (1.1") falling throughout the month. The drop in temperature corresponds to the fall in sea temperatures, marking a decrease in beach activities. Weather in November »
Weather in December
December marks the onset of the cold season in Ulsan with temperatures sliding down to a chilly 6.7°C (44.1°F). Ulsan receives the first hints of snow this month, with the city receiving a slight snowfall of 1mm (0.04"). The fall in temperature is accompanied by a drop in sea temperatures, marking a complete halt of beach activities. Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Ulsan?
Ulsan experiences its average lowest temperatures in January, reaching a peak of 4.8°C (40.6°F) and a minimum of -1.3°C (29.7°F).
What is the least humid month in Ulsan?
With an average relative humidity of 60%, January is the least humid month in Ulsan, South Korea.
How much does it rain in Ulsan?
Throughout the year, in Ulsan, South Korea, there are 129.7 rainfall days, and 902mm (35.51") of precipitation is accumulated.
When does it snow in Ulsan?
January through March and December are months with snowfall.
How much does it snow in Ulsan?
In Ulsan, during the entire year, snow falls for 3.5 days and aggregates up to 25mm (0.98") of snow.
What is the month with the lowest UV index in Ulsan?
The months with the lowest UV index in Ulsan, South Korea, are January and December, with an average maximum UV index of 2.
When does it snow the most in Ulsan?
The month with the most snowfall in Ulsan is February, when snow falls for 1.8 days and typically aggregates up to 13mm (0.51") of snow.
When is the sea coldest in Ulsan?
The month with the coldest seawater in Ulsan is March, with an average sea temperature of 12.3°C (54.1°F).
When it does not snow in Ulsan?
In Ulsan, snow does not fall in April through November.
What month has the most sunshine in Ulsan?
The month with the most sunshine in Ulsan is May, with an average of 9.6h of sunshine.
When are the longest days in Ulsan?
June has the longest days of the year, with an average of 14h and 30min of daylight.
What is the most humid month in Ulsan?
The most humid month in Ulsan, South Korea, is July, with an average relative humidity of 86%.
What is the rainiest month in Ulsan?
July is the month with the most rainfall in Ulsan. Rain falls for 19.8 days and accumulates 180mm (7.09") of precipitation.
When is the highest UV index in Ulsan?
July is the month with the highest UV index, with an average maximum UV index of 7.
What is the warmest month in Ulsan?
Ulsan, South Korea, reaches its average highest temperatures in August, measuring 28°C (82.4°F) at the peak and 23.3°C (73.9°F) at the lowest.
What month is the sea warmest in Ulsan?
August is the month with the warmest seawater, with an average sea temperature of 25.6°C (78.1°F).
What is the driest month in Ulsan?
The month with the least rainfall is November, when the rain falls for 8.5 days and typically collects 28mm (1.1") of precipitation.
What is the month with the least sunshine in Ulsan?
With an average of 6h of sunshine, November has the least sunshine of the year.
What is the month with the shortest days in Ulsan?
The month with the shortest days in Ulsan, South Korea, is December, with an average of 9h and 48min of daylight.
Is there Daylight Saving Time (DST) in Ulsan?
Ulsan does not observe Daylight Saving Time (DST). KST timezone is used throughout the entire year.
Average temperature
Ulsan, South Korea
The warmest month (with the highest average high temperature) is August (28°C).
The month with the lowest average high temperature is January (4.8°C).
The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure
Ulsan, South Korea
- Average pressure in January:
1023.1mbar - Average pressure in February:
1022mbar - Average pressure in March:
1018.9mbar - Average pressure in April:
1015.2mbar - Average pressure in May:
1011.6mbar - Average pressure in June:
1008mbar
- Average pressure in July:
1007.6mbar - Average pressure in August:
1008.5mbar - Average pressure in September:
1013.4mbar - Average pressure in October:
1018.3mbar - Average pressure in November:
1021.2mbar - Average pressure in December:
1022.5mbar
The month with the highest atmospheric pressure is January (1023.1mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).
Average wind speed
Ulsan, South Korea
- Average wind speed in January:
17.1km/h - Average wind speed in February:
15.9km/h - Average wind speed in March:
16km/h - Average wind speed in April:
15km/h - Average wind speed in May:
13.1km/h - Average wind speed in June:
11.5km/h
- Average wind speed in July:
13.3km/h - Average wind speed in August:
13.8km/h - Average wind speed in September:
14.7km/h - Average wind speed in October:
15.5km/h - Average wind speed in November:
15.1km/h - Average wind speed in December:
17.1km/h
The windiest months (with the highest average wind speed) are January and December (17.1km/h).
The calmest month (with the lowest average wind speed) is June (11.5km/h).
Average humidity
Ulsan, South Korea
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (60%).
Average rainfall
Ulsan, South Korea
The wettest month (with the highest rainfall) is July (180mm).
The driest month (with the least rainfall) is November (28mm).
Average rainfall days
Ulsan, South Korea
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
9.8 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
19.8 days - Average rainfall days in August:
16.2 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
6 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is January (5.3 days).
Average snowfall
Ulsan, South Korea
The month with the highest snowfall is February (13mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Ulsan, South Korea
- Average snowfall days in January:
0.5 days - Average snowfall days in February:
1.8 days - Average snowfall days in March:
0.6 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.6 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature
Ulsan, South Korea
The best month for swimming (with the highest average sea temperature) is August (25.6°C).
The coldest month (with the lowest average sea temperature) is March (12.3°C).
Average daylight / Average sunshine
Ulsan, South Korea
- Average daylight in January:
10h and 1min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 3min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
6h and 2min - Average sunshine in February:
6h and 5min - Average sunshine in March:
7h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 4min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
8h and 3min - Average sunshine in August:
9h and 2min - Average sunshine in September:
7h and 3min - Average sunshine in October:
6h and 2min - Average sunshine in November:
6h and 0min - Average sunshine in December:
6h and 2min
The month with the most sunshine is May (Average sunshine: 9h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 0min).
Average sunshine days
Ulsan, South Korea
- Average sunshine days in January:
24.8 days - Average sunshine days in February:
19 days - Average sunshine days in March:
19.3 days - Average sunshine days in April:
17.1 days - Average sunshine days in May:
19.2 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
8.7 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.1 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
20.3 days - Average sunshine days in December:
23.5 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is July (8.7 days).
Average UV index
Ulsan, South Korea
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Ulsan, South Korea
The month with the most cloud cover is July (Cloud cover 46).
The month with the least cloud cover is December (Cloud cover 25).
Average visibility
Ulsan, South Korea
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
Ulsan, South Korea
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
