Yeosu climate — normals and trends
Yeosu (South Korea) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 1,440 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 (3.1 °C). Rainfall peaks in July.
Yeosu averages 26 frost days, 1 hot days (≥ 30 °C) and 97 rainy days per year.
Yeosu 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 33 to 19 per year over the period.
The hottest day of the period reached 32.1 °C (on 7 August 2017) and the coldest -9.5 °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
YeosuJeollanam-do
- coords
- 34.76°, 127.66°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
16.2°C
Average daily low
12.7°C
Annual rainfall
1,440mm
Sunshine / day
8.8h
Mean relative humidity
75%
Average peak wind
23.4km/h
Seasonal range
22.7°C
Frost days (< 0 °C)
26 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
97 d/yr
Annual snowfall
2.7 cm
Average feels-like high
15.3 °C
Average feels-like low
10.6 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
93 d/yr
Solar radiation
15.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
32.1 °C
7 August 2017
Coldest day
-9.5 °C
16 January 1967
Wettest day
229 mm
24 June 1985
Windiest day
85.4 km/h
12 September 2003
Strongest gust
158.0 km/h
17 September 1959
Hottest feels-like
39.2 °C
3 August 2024
Coldest feels-like
-16.8 °C
5 January 1970
Snowiest day
11.1 cm
11 February 1994
Sunniest day
13.8 h
26 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 | 6.5 °C | +0.8 °C | 12 mm | -22 mm |
| Feb | 5.2 °C | -1.7 °C | 44 mm | -6 mm |
| Mar | 10.6 °C | +0.3 °C | 81 mm | -8 mm |
| Apr | 14.8 °C | +0.5 °C | 75 mm | -64 mm |
| May | 18.2 °C | 0.0 °C | 198 mm | +50 mm |
| Jun | 22.9 °C | +1.6 °C | 169 mm | -46 mm |
| Jul | 27.9 °C | +2.9 °C | 128 mm | -135 mm |
| Aug | 28.9 °C | +1.9 °C | 259 mm | +73 mm |
| Sep | 26.3 °C | +2.1 °C | 161 mm | -6 mm |
| Oct | 21.7 °C | +2.2 °C | 153 mm | +87 mm |
| Nov | 15.1 °C | +1.3 °C | 29 mm | -26 mm |
| Dec | 9.4 °C | +1.2 °C | 15 mm | -14 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 Yeosu?
Yeosu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 1,440 mm of precipitation per year.
What is the hottest day ever recorded in Yeosu?
The hottest day measured in Yeosu between 1940 and 2025 was 7 August 2017, reaching 32.1 °C.
What is the coldest day in Yeosu?
The coldest day measured in Yeosu between 1940 and 2025 was 16 January 1967, at -9.5 °C.
Does it snow in Yeosu?
Yes. Yeosu gets on average 2.7 cm of snow per year and has around 26 frost days.
Has the climate of Yeosu warmed?
Yes: Yeosu warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yeosu?
The wettest day measured in Yeosu between 1940 and 2025 was 24 June 1985, with 229 mm of rain in 24 hours.
What was the windiest day in Yeosu?
The windiest day measured in Yeosu between 1940 and 2025 was 12 September 2003, with winds reaching 85.4 km/h.
What is the warmest month in Yeosu?
The warmest month in Yeosu is August (25.8 °C on average); the coldest is January (3.1 °C).
How much does it rain in Yeosu?
Yeosu receives on average 1,440 mm of precipitation per year, spread over about 97 rainy days.
Is it sunny in Yeosu?
Yeosu gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Yeosu?
The heaviest 24-hour snowfall measured in Yeosu between 1940 and 2025 was 11 February 1994, with 11.1 cm.
Are there tropical nights in Yeosu?
Yes: Yeosu has on average 93 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yeosu?
In Yeosu, between 1940 and 2025, the highest apparent temperature reached 39.2 °C on 3 August 2024, and the lowest was -16.8 °C on 5 January 1970.
Compare Yeosu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yeosu