Buan climate — normals and trends
Buan (South Korea) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.1 °C and it receives 1,254 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 (25.9 °C on average) and the coldest is January (0.6 °C). Rainfall peaks in July.
Buan averages 59 frost days, 11 hot days (≥ 30 °C) and 112 rainy days per year.
Buan has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 68 to 50 per year over the period.
The hottest day of the period reached 35.2 °C (on 22 August 2018) and the coldest -14.3 °C (on 8 January 2021).
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
BuanJeollabuk-do
- coords
- 35.73°, 126.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.1°C
Average daily high
16.2°C
Average daily low
10.4°C
Annual rainfall
1,254mm
Sunshine / day
8.7h
Mean relative humidity
75%
Average peak wind
18.2km/h
Seasonal range
25.3°C
Frost days (< 0 °C)
59 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
112 d/yr
Annual snowfall
24.6 cm
Average feels-like high
15.6 °C
Average feels-like low
8.8 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
76 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
35.2 °C
22 August 2018
Coldest day
-14.3 °C
8 January 2021
Wettest day
183 mm
30 September 1998
Windiest day
67.3 km/h
28 August 2012
Strongest gust
123.5 km/h
28 August 2012
Hottest feels-like
41.8 °C
5 August 2017
Coldest feels-like
-20.4 °C
8 January 2021
Snowiest day
10.2 cm
24 January 1981
Sunniest day
14.0 h
28 June 1951
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 | 4.8 °C | +1.4 °C | 33 mm | -5 mm |
| Feb | 3.8 °C | -1.0 °C | 26 mm | -14 mm |
| Mar | 11.3 °C | +2.1 °C | 54 mm | -5 mm |
| Apr | 16.6 °C | +1.6 °C | 66 mm | -23 mm |
| May | 20.1 °C | +0.2 °C | 116 mm | +15 mm |
| Jun | 25.4 °C | +1.7 °C | 300 mm | +144 mm |
| Jul | 30.3 °C | +3.3 °C | 251 mm | -19 mm |
| Aug | 30.0 °C | +1.6 °C | 171 mm | -24 mm |
| Sep | 26.7 °C | +2.0 °C | 245 mm | +93 mm |
| Oct | 21.2 °C | +2.1 °C | 167 mm | +109 mm |
| Nov | 14.0 °C | +1.3 °C | 16 mm | -41 mm |
| Dec | 7.7 °C | +1.4 °C | 40 mm | -0 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 Buan?
Buan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.1 °C and it receives 1,254 mm of precipitation per year.
What is the hottest day ever recorded in Buan?
The hottest day measured in Buan between 1940 and 2025 was 22 August 2018, reaching 35.2 °C.
What is the coldest day in Buan?
The coldest day measured in Buan between 1940 and 2025 was 8 January 2021, at -14.3 °C.
Does it snow in Buan?
Yes. Buan gets on average 24.6 cm of snow per year and has around 59 frost days.
Has the climate of Buan warmed?
Yes: Buan warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Buan?
The wettest day measured in Buan between 1940 and 2025 was 30 September 1998, with 183 mm of rain in 24 hours.
What was the windiest day in Buan?
The windiest day measured in Buan between 1940 and 2025 was 28 August 2012, with winds reaching 67.3 km/h.
What is the warmest month in Buan?
The warmest month in Buan is August (25.9 °C on average); the coldest is January (0.6 °C).
How much does it rain in Buan?
Buan receives on average 1,254 mm of precipitation per year, spread over about 112 rainy days.
Is it sunny in Buan?
Buan gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Buan?
The heaviest 24-hour snowfall measured in Buan between 1940 and 2025 was 24 January 1981, with 10.2 cm.
Are there tropical nights in Buan?
Yes: Buan has on average 76 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Buan?
In Buan, between 1940 and 2025, the highest apparent temperature reached 41.8 °C on 5 August 2017, and the lowest was -20.4 °C on 8 January 2021.
Compare Buan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Buan