Busan, South Korea Climate & Monthly Averages
Busan has a humid subtropical climate. August is the hottest month, averaging 84° by day; January is the coldest at 44°.
Busan's climate is a story of contrasts
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).
August
84° by day 75° at nightJanuary
44° by day 29° at nightThe two ends of 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.
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.
More climate facts for Busan
- 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%
Four distinct parts of the year 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.
Busan temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
Choosing a season in Busan
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.
What to pack
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.
Monthly highs, lows and seasonal change
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 44° | 29° | 4 | 1.6 in | 7.7 h/day | 10.0 h | 13% | 57% |
| February | 48° | 32° | 6 | 2.1 in | 8.5 h/day | 10.9 h | 20% | 59% |
| March | 56° | 40° | 8 | 3.7 in | 8.7 h/day | 11.9 h | 25% | 68% |
| April | 63° | 49° | 8 | 5.0 in | 8.9 h/day | 13.0 h | 28% | 72% |
| May | 70° | 57° | 8 | 4.6 in | 9.8 h/day | 14.0 h | 26% | 76% |
| June | 75° | 65° | 10 | 7.7 in | 9.0 h/day | 14.5 h | 34% | 83% |
| July | 81° | 73° | 15 | 10.6 in | 8.6 h/day | 14.3 h | 50% | 88% |
| August | 84° | 75° | 14 | 8.0 in | 10.1 h/day | 13.5 h | 46% | 83% |
| September | 77° | 68° | 13 | 10.2 in | 7.8 h/day | 12.3 h | 42% | 80% |
| October | 69° | 56° | 6 | 3.7 in | 8.3 h/day | 11.2 h | 18% | 72% |
| November | 59° | 44° | 4 | 2.1 in | 8.0 h/day | 10.3 h | 15% | 67% |
| December | 47° | 32° | 4 | 1.4 in | 7.8 h/day | 9.8 h | 13% | 59% |
Busan from the coldest month to the hottest
Each card shows the average high and low. The bar places that month between Busan's coldest night and warmest afternoon.
January
- Rain
- 4 days
- Sunshine
- 7.7 h
- Daylight
- 10.0 h
February
- Rain
- 6 days
- Sunshine
- 8.5 h
- Daylight
- 10.9 h
March
- Rain
- 8 days
- Sunshine
- 8.7 h
- Daylight
- 11.9 h
April
- Rain
- 8 days
- Sunshine
- 8.9 h
- Daylight
- 13.0 h
May
- Rain
- 8 days
- Sunshine
- 9.8 h
- Daylight
- 14.0 h
June
- Rain
- 10 days
- Sunshine
- 9.0 h
- Daylight
- 14.5 h
July
- Rain
- 15 days
- Sunshine
- 8.6 h
- Daylight
- 14.3 h
August
- Rain
- 14 days
- Sunshine
- 10.1 h
- Daylight
- 13.5 h
September
- Rain
- 13 days
- Sunshine
- 7.8 h
- Daylight
- 12.3 h
October
- Rain
- 6 days
- Sunshine
- 8.3 h
- Daylight
- 11.2 h
November
- Rain
- 4 days
- Sunshine
- 8.0 h
- Daylight
- 10.3 h
December
- Rain
- 4 days
- Sunshine
- 7.8 h
- Daylight
- 9.8 h
Looking for warmer alternatives? Browse warm places by month, or compare Busan's coolest part of the year: January, December, February.
Where Busan sits among other climates
- 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.
These comparisons use the same ten-year window for every city in the dataset.