Wonsan climate — normals and trends
Wonsan (North Korea) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 1,332 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 (23.6 °C on average) and the coldest is January (-4.0 °C). Rainfall peaks in July.
Wonsan averages 97 frost days, 4 hot days (≥ 30 °C) and 109 rainy days per year.
Wonsan has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 120 to 74 per year over the period.
The hottest day of the period reached 35.2 °C (on 27 July 2025) and the coldest -20.9 °C (on 31 January 1941).
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
WonsanKangwŏn-do
- coords
- 39.15°, 127.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
13.2°C
Average daily low
7.6°C
Annual rainfall
1,332mm
Sunshine / day
8.8h
Mean relative humidity
74%
Average peak wind
19.7km/h
Seasonal range
27.6°C
Frost days (< 0 °C)
97 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
109 d/yr
Annual snowfall
83.6 cm
Average feels-like high
11.6 °C
Average feels-like low
5.1 °C
Average peak gust
33.3 km/h
Tropical nights (≥ 20 °C)
50 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.69 · 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
27 July 2025
Coldest day
-20.9 °C
31 January 1941
Wettest day
197 mm
2 August 1999
Windiest day
70.3 km/h
28 August 1986
Strongest gust
126.7 km/h
28 August 1986
Hottest feels-like
41.4 °C
27 July 2025
Coldest feels-like
-28.5 °C
16 January 1958
Snowiest day
42.5 cm
3 March 1989
Sunniest day
14.7 h
23 June 1960
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 | 1.8 °C | +2.3 °C | 14 mm | -22 mm |
| Feb | 2.3 °C | +1.0 °C | 2 mm | -38 mm |
| Mar | 8.0 °C | +2.4 °C | 72 mm | +20 mm |
| Apr | 13.4 °C | +1.2 °C | 74 mm | +3 mm |
| May | 18.2 °C | +0.3 °C | 106 mm | +12 mm |
| Jun | 24.9 °C | +3.6 °C | 133 mm | +5 mm |
| Jul | 28.5 °C | +3.8 °C | 123 mm | -151 mm |
| Aug | 28.8 °C | +3.2 °C | 75 mm | -192 mm |
| Sep | 24.2 °C | +2.4 °C | 225 mm | +55 mm |
| Oct | 16.7 °C | 0.0 °C | 362 mm | +282 mm |
| Nov | 11.6 °C | +2.0 °C | 38 mm | -40 mm |
| Dec | 3.7 °C | +1.2 °C | 43 mm | +2 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 Wonsan?
Wonsan has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 1,332 mm of precipitation per year.
What is the hottest day ever recorded in Wonsan?
The hottest day measured in Wonsan between 1940 and 2025 was 27 July 2025, reaching 35.2 °C.
What is the coldest day in Wonsan?
The coldest day measured in Wonsan between 1940 and 2025 was 31 January 1941, at -20.9 °C.
Does it snow in Wonsan?
Yes. Wonsan gets on average 83.6 cm of snow per year and has around 97 frost days.
Has the climate of Wonsan warmed?
Yes: Wonsan warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Wonsan?
The wettest day measured in Wonsan between 1940 and 2025 was 2 August 1999, with 197 mm of rain in 24 hours.
What was the windiest day in Wonsan?
The windiest day measured in Wonsan between 1940 and 2025 was 28 August 1986, with winds reaching 70.3 km/h.
What is the warmest month in Wonsan?
The warmest month in Wonsan is August (23.6 °C on average); the coldest is January (-4.0 °C).
How much does it rain in Wonsan?
Wonsan receives on average 1,332 mm of precipitation per year, spread over about 109 rainy days.
Is it sunny in Wonsan?
Wonsan 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 Wonsan?
The heaviest 24-hour snowfall measured in Wonsan between 1940 and 2025 was 3 March 1989, with 42.5 cm.
Are there tropical nights in Wonsan?
Yes: Wonsan has on average 50 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Wonsan?
In Wonsan, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 27 July 2025, and the lowest was -28.5 °C on 16 January 1958.
Compare Wonsan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Wonsan