Kosan climate — normals and trends
Kosan (North Korea) has a warm-summer humid continental, dry winter climate (Dwb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 1,244 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 (21.6 °C on average) and the coldest is January (-9.7 °C). Rainfall peaks in July.
Kosan averages 149 frost days, 5 hot days (≥ 30 °C) and 114 rainy days per year.
Kosan has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 160 to 138 per year over the period.
The hottest day of the period reached 34.6 °C (on 3 August 2018) and the coldest -36.5 °C (on 9 January 1940).
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
KosanKangwŏn-do
- coords
- 38.86°, 127.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
12.6°C
Average daily low
2.5°C
Annual rainfall
1,244mm
Sunshine / day
8.6h
Mean relative humidity
76%
Average peak wind
13.1km/h
Seasonal range
31.3°C
Frost days (< 0 °C)
149 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
96.1 cm
Average feels-like high
10.9 °C
Average feels-like low
0.3 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
18 d/yr
Solar radiation
14.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.64 · 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
34.6 °C
3 August 2018
Coldest day
-36.5 °C
9 January 1940
Wettest day
232 mm
2 August 1999
Windiest day
38.2 km/h
27 May 1980
Strongest gust
123.8 km/h
26 April 1983
Hottest feels-like
41.2 °C
3 August 2018
Coldest feels-like
-41.4 °C
9 January 1940
Snowiest day
47.1 cm
3 March 1989
Sunniest day
14.6 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 | -0.7 °C | +2.6 °C | 16 mm | -12 mm |
| Feb | 0.0 °C | +0.4 °C | 4 mm | -30 mm |
| Mar | 8.3 °C | +2.7 °C | 57 mm | +5 mm |
| Apr | 15.6 °C | +1.9 °C | 98 mm | +17 mm |
| May | 18.6 °C | -0.9 °C | 106 mm | +10 mm |
| Jun | 24.9 °C | +2.2 °C | 179 mm | +46 mm |
| Jul | 28.1 °C | +3.2 °C | 108 mm | -180 mm |
| Aug | 28.1 °C | +2.5 °C | 95 mm | -151 mm |
| Sep | 23.5 °C | +2.1 °C | 234 mm | +86 mm |
| Oct | 15.2 °C | -0.3 °C | 192 mm | +137 mm |
| Nov | 9.5 °C | +2.3 °C | 19 mm | -31 mm |
| Dec | 0.9 °C | +1.5 °C | 34 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 Kosan?
Kosan has a warm-summer humid continental, dry winter climate (Köppen Dwb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 1,244 mm of precipitation per year.
What is the hottest day ever recorded in Kosan?
The hottest day measured in Kosan between 1940 and 2025 was 3 August 2018, reaching 34.6 °C.
What is the coldest day in Kosan?
The coldest day measured in Kosan between 1940 and 2025 was 9 January 1940, at -36.5 °C.
Does it snow in Kosan?
Yes. Kosan gets on average 96.1 cm of snow per year and has around 149 frost days.
Has the climate of Kosan warmed?
Yes: Kosan warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kosan?
The wettest day measured in Kosan between 1940 and 2025 was 2 August 1999, with 232 mm of rain in 24 hours.
What was the windiest day in Kosan?
The windiest day measured in Kosan between 1940 and 2025 was 27 May 1980, with winds reaching 38.2 km/h.
What is the warmest month in Kosan?
The warmest month in Kosan is August (21.6 °C on average); the coldest is January (-9.7 °C).
How much does it rain in Kosan?
Kosan receives on average 1,244 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Kosan?
Kosan gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kosan?
The heaviest 24-hour snowfall measured in Kosan between 1940 and 2025 was 3 March 1989, with 47.1 cm.
Are there tropical nights in Kosan?
Yes: Kosan has on average 18 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kosan?
In Kosan, between 1940 and 2025, the highest apparent temperature reached 41.2 °C on 3 August 2018, and the lowest was -41.4 °C on 9 January 1940.
Compare Kosan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kosan