Kosong climate — normals and trends
Kosong (South Korea) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.5 °C and it receives 1,222 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 (24.2 °C on average) and the coldest is January (-2.3 °C). Rainfall peaks in August.
Kosong averages 80 frost days, 7 hot days (≥ 30 °C) and 110 rainy days per year.
Kosong has warmed by +2.3 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 97 to 63 per year over the period.
The hottest day of the period reached 35.7 °C (on 4 August 2018) and the coldest -20.2 °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
KosongGangwon-do
- coords
- 38.38°, 128.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.5°C
Average daily high
14.7°C
Average daily low
8.6°C
Annual rainfall
1,222mm
Sunshine / day
9.0h
Mean relative humidity
71%
Average peak wind
17.6km/h
Seasonal range
26.5°C
Frost days (< 0 °C)
80 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
110 d/yr
Annual snowfall
73.5 cm
Average feels-like high
13.4 °C
Average feels-like low
6.4 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
55 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.57 · 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
35.7 °C
4 August 2018
Coldest day
-20.2 °C
31 January 1941
Wettest day
208 mm
13 September 1954
Windiest day
59.8 km/h
25 October 1968
Strongest gust
111.6 km/h
25 October 1968
Hottest feels-like
43.3 °C
4 August 2018
Coldest feels-like
-27.2 °C
31 January 1941
Snowiest day
32.1 cm
1 March 2021
Sunniest day
14.6 h
24 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 | 3.9 °C | +2.3 °C | 13 mm | -33 mm |
| Feb | 4.0 °C | +0.8 °C | 1 mm | -47 mm |
| Mar | 9.1 °C | +1.4 °C | 89 mm | +29 mm |
| Apr | 15.0 °C | +1.0 °C | 53 mm | -15 mm |
| May | 19.0 °C | -0.2 °C | 73 mm | -8 mm |
| Jun | 25.5 °C | +3.4 °C | 75 mm | -37 mm |
| Jul | 29.4 °C | +3.9 °C | 148 mm | -68 mm |
| Aug | 30.0 °C | +3.5 °C | 104 mm | -113 mm |
| Sep | 25.1 °C | +2.6 °C | 263 mm | +86 mm |
| Oct | 17.8 °C | 0.0 °C | 370 mm | +288 mm |
| Nov | 13.4 °C | +2.1 °C | 34 mm | -36 mm |
| Dec | 6.0 °C | +1.4 °C | 44 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 Kosong?
Kosong has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.5 °C and it receives 1,222 mm of precipitation per year.
What is the hottest day ever recorded in Kosong?
The hottest day measured in Kosong between 1940 and 2025 was 4 August 2018, reaching 35.7 °C.
What is the coldest day in Kosong?
The coldest day measured in Kosong between 1940 and 2025 was 31 January 1941, at -20.2 °C.
Does it snow in Kosong?
Yes. Kosong gets on average 73.5 cm of snow per year and has around 80 frost days.
Has the climate of Kosong warmed?
Yes: Kosong warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kosong?
The wettest day measured in Kosong between 1940 and 2025 was 13 September 1954, with 208 mm of rain in 24 hours.
What was the windiest day in Kosong?
The windiest day measured in Kosong between 1940 and 2025 was 25 October 1968, with winds reaching 59.8 km/h.
What is the warmest month in Kosong?
The warmest month in Kosong is August (24.2 °C on average); the coldest is January (-2.3 °C).
How much does it rain in Kosong?
Kosong receives on average 1,222 mm of precipitation per year, spread over about 110 rainy days.
Is it sunny in Kosong?
Kosong gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kosong?
The heaviest 24-hour snowfall measured in Kosong between 1940 and 2025 was 1 March 2021, with 32.1 cm.
Are there tropical nights in Kosong?
Yes: Kosong has on average 55 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kosong?
In Kosong, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 4 August 2018, and the lowest was -27.2 °C on 31 January 1941.
Compare Kosong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kosong