Busan climate — normals and trends
Busan (South Korea) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.1 °C and it receives 1,305 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (25.8 °C on average) and the coldest is January (4.8 °C). Rainfall peaks in July.
Busan averages 16 frost days, 0 hot days (≥ 30 °C) and 92 rainy days per year.
Busan has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 23 to 9 per year over the period.
The hottest day of the period reached 31.2 °C (on 14 August 2016) and the coldest -8.7 °C (on 16 January 1967).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
BusanBusan
- coords
- 35.10°, 129.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.1°C
Average daily high
16.6°C
Average daily low
13.5°C
Annual rainfall
1,305mm
Sunshine / day
8.9h
Mean relative humidity
73%
Average peak wind
29.1km/h
Seasonal range
21.0°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
92 d/yr
Annual snowfall
1.3 cm
Average feels-like high
15.3 °C
Average feels-like low
10.6 °C
Average peak gust
42.0 km/h
Tropical nights (≥ 20 °C)
96 d/yr
Solar radiation
15.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.36 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
31.2 °C
14 August 2016
Coldest day
-8.7 °C
16 January 1967
Wettest day
201 mm
24 June 1985
Windiest day
121.6 km/h
31 August 1987
Strongest gust
178.6 km/h
31 August 1987
Hottest feels-like
38.7 °C
7 August 2017
Coldest feels-like
-18.3 °C
16 January 1967
Snowiest day
8.0 cm
10 March 2010
Sunniest day
13.8 h
19 June 1974
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.5 °C | +0.4 °C | 15 mm | -20 mm |
| Feb | 6.9 °C | -1.3 °C | 35 mm | -16 mm |
| Mar | 11.1 °C | -0.1 °C | 82 mm | -4 mm |
| Apr | 14.6 °C | 0.0 °C | 67 mm | -61 mm |
| May | 17.3 °C | -0.4 °C | 183 mm | +49 mm |
| Jun | 21.7 °C | +1.0 °C | 172 mm | -12 mm |
| Jul | 26.9 °C | +2.5 °C | 99 mm | -122 mm |
| Aug | 28.3 °C | +1.6 °C | 204 mm | +49 mm |
| Sep | 26.6 °C | +2.4 °C | 88 mm | -69 mm |
| Oct | 22.2 °C | +2.3 °C | 131 mm | +61 mm |
| Nov | 16.1 °C | +1.2 °C | 23 mm | -32 mm |
| Dec | 11.3 °C | +1.8 °C | 22 mm | -9 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Busan?
Busan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.1 °C and it receives 1,305 mm of precipitation per year.
What is the hottest day ever recorded in Busan?
The hottest day measured in Busan between 1940 and 2025 was 14 August 2016, reaching 31.2 °C.
What is the coldest day in Busan?
The coldest day measured in Busan between 1940 and 2025 was 16 January 1967, at -8.7 °C.
Does it snow in Busan?
Yes. Busan gets on average 1.3 cm of snow per year and has around 16 frost days.
Has the climate of Busan warmed?
Yes: Busan warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Busan?
The wettest day measured in Busan between 1940 and 2025 was 24 June 1985, with 201 mm of rain in 24 hours.
What was the windiest day in Busan?
The windiest day measured in Busan between 1940 and 2025 was 31 August 1987, with winds reaching 121.6 km/h.
What is the warmest month in Busan?
The warmest month in Busan is August (25.8 °C on average); the coldest is January (4.8 °C).
How much does it rain in Busan?
Busan receives on average 1,305 mm of precipitation per year, spread over about 92 rainy days.
Is it sunny in Busan?
Busan gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Busan?
The heaviest 24-hour snowfall measured in Busan between 1940 and 2025 was 10 March 2010, with 8.0 cm.
Are there tropical nights in Busan?
Yes: Busan has on average 96 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Busan?
In Busan, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 7 August 2017, and the lowest was -18.3 °C on 16 January 1967.
Compare Busan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Busan