Busan, South Korea Climate & Monthly Averages
The climate of Busan
A 24°C spread between its warmest and coolest months puts Busan among the more strongly seasonal places we cover. August averages 84°F (29°C) by day; January averages 44°F (7°C), with nights at 29°F (-2°C).
Climate quick facts
- Hottest month: August - highs near 84°F (29°C)
- Coldest month: January - highs near 44°F (7°C)
- Decade extremes (2015-2024): 94°F (34°C) high · 9°F (-13°C) low
- Wettest month: July (15 rainy days) · Sunniest: August (10.1 h sun/day)
- Climate type: humid subtropical
- Annual swing: 24°C between the average warmest and coolest month · day to night: 7°C
- Months with freezing average lows: 2
- Average humidity: 72%
Temperatures through the year
At its warmest, in August, Busan runs to 84°F (29°C) in the afternoon and back to 75°F (24°C) by dawn. January sits at the other end of the year: 44°F (7°C) by day, 29°F (-2°C) at night. The gridded 2015-2024 daily record for this location tops out at 94°F (34°C) and bottoms at 9°F (-13°C) - decade extremes, not all-time station records. When it does rain it rains hard - about 15.4 mm on an average wet day, against roughly 6 mm for a typical temperate city.
Rain, sun and snow
The wettest month is July (10.6 inches (269 mm) across 15 days) and the driest December. Snowfall is rare but not unheard of. Days and nights are about 7°C apart on average - narrower than about 78% of the cities we track.
How Busan compares
- Busan sits close to the middle of our dataset on most measures: 58°F (14°C) as an annual average, 60.6 inches (1539 mm) of precipitation and 8.6 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 44° | 29° | 4 | 1.6 in | 7.7 h/day | 57% |
| February | 48° | 32° | 6 | 2.1 in | 8.5 h/day | 59% |
| March | 56° | 40° | 8 | 3.7 in | 8.7 h/day | 68% |
| April | 63° | 49° | 8 | 5.0 in | 8.9 h/day | 72% |
| May | 70° | 57° | 8 | 4.6 in | 9.8 h/day | 76% |
| June | 75° | 65° | 10 | 7.7 in | 9.0 h/day | 83% |
| July | 81° | 73° | 15 | 10.6 in | 8.6 h/day | 88% |
| August | 84° | 75° | 14 | 8.0 in | 10.1 h/day | 83% |
| September | 77° | 68° | 13 | 10.2 in | 7.8 h/day | 80% |
| October | 69° | 56° | 6 | 3.7 in | 8.3 h/day | 72% |
| November | 59° | 44° | 4 | 2.1 in | 8.0 h/day | 67% |
| December | 47° | 32° | 4 | 1.4 in | 7.8 h/day | 59% |
Busan month by month
Busan weather in January
January brings highs around 44°F (7°C), lows near 29°F (-2°C), about 4 wet days - typically the coldest month of the year in Busan.
Busan weather in February
February brings highs around 48°F (9°C), lows near 32°F (0°C), about 6 wet days.
Busan weather in March
March brings highs around 56°F (13°C), lows near 40°F (4°C), about 8 wet days.
Busan weather in April
April brings highs around 63°F (17°C), lows near 49°F (9°C), about 8 wet days.
Busan weather in May
May brings highs around 70°F (21°C), lows near 57°F (14°C), about 8 wet days.
Busan weather in June
June brings highs around 75°F (24°C), lows near 65°F (18°C), about 10 wet days.
Busan weather in July
July brings highs around 81°F (27°C), lows near 73°F (23°C), about 15 wet days - typically the wettest month of the year in Busan.
Busan weather in August
August brings highs around 84°F (29°C), lows near 75°F (24°C), about 14 wet days - typically the hottest month and the sunniest month of the year in Busan.
Busan weather in September
September brings highs around 77°F (25°C), lows near 68°F (20°C), about 13 wet days.
Busan weather in October
October brings highs around 69°F (21°C), lows near 56°F (13°C), about 6 wet days.
Busan weather in November
November brings highs around 59°F (15°C), lows near 44°F (7°C), about 4 wet days.
Busan weather in December
December brings highs around 47°F (8°C), lows near 32°F (0°C), about 4 wet days - typically the driest month of the year in Busan.
Seasons in Busan
Spring (March through May)
Through spring, Busan stays on the cool side of mild: 63°F (17°C) by day, 48°F (9°C) after dark, and expect showers on roughly 24 days across the season.
Summer (June through August)
Summer in Busan settles into easy warmth, with daytime highs averaging 80°F (27°C) and nights around 71°F (22°C); rain falls on around 40 of the 90 days.
Fall (September through November)
Fall is mild and warm here - highs near 69°F (20°C), nights near 56°F (13°C), and expect showers on roughly 23 days across the season.
Winter (December through February)
Through winter, Busan is brisk and cold: 46°F (8°C) by day, 31°F (-1°C) after dark, and rain comes on about 14 days over the three months.
Climate questions, answered
Does it freeze in Busan?
How humid does Busan get?
Does it rain a lot in Busan?
How cold does Busan get in winter?
How warm is Busan on average?
Best time to visit Busan
April to June and October to November is the sweet spot for Busan - warm days, manageable rainfall and plenty of daylight line up. Expect 67°F (20°C) in the afternoon and around 7 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in April.
Pack for Busan with light clothing for the warm months, a warm jacket and layers for the cooler season and a compact umbrella or rain shell. August nights average 75°F (24°C), so evenings rarely match the afternoons.
Busan temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.