Wŏnju climate — normals and trends
Wŏnju (South Korea) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 10.7 °C and it receives 1,248 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 (-4.8 °C). Rainfall peaks in July.
Wŏnju averages 121 frost days, 20 hot days (≥ 30 °C) and 109 rainy days per year.
Wŏnju has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 133 to 109 per year over the period.
The hottest day of the period reached 37.0 °C (on 1 August 2018) and the coldest -29.7 °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
WŏnjuGangwon-do
- coords
- 37.35°, 127.95°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.7°C
Average daily high
15.7°C
Average daily low
5.8°C
Annual rainfall
1,248mm
Sunshine / day
8.5h
Mean relative humidity
70%
Average peak wind
13.1km/h
Seasonal range
29.0°C
Frost days (< 0 °C)
121 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
109 d/yr
Annual snowfall
37.0 cm
Average feels-like high
14.4 °C
Average feels-like low
4.2 °C
Average peak gust
35.8 km/h
Tropical nights (≥ 20 °C)
42 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.55 · 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
37.0 °C
1 August 2018
Coldest day
-29.7 °C
31 January 1941
Wettest day
186 mm
19 August 1972
Windiest day
38.6 km/h
7 September 2019
Strongest gust
124.2 km/h
28 August 1986
Hottest feels-like
42.5 °C
1 August 2018
Coldest feels-like
-34.5 °C
31 January 1941
Snowiest day
20.2 cm
28 January 1969
Sunniest day
14.3 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 | 2.4 °C | +2.1 °C | 20 mm | -6 mm |
| Feb | 2.3 °C | -0.9 °C | 9 mm | -24 mm |
| Mar | 12.0 °C | +2.6 °C | 56 mm | -4 mm |
| Apr | 18.4 °C | +1.7 °C | 88 mm | -4 mm |
| May | 21.4 °C | -0.5 °C | 103 mm | +4 mm |
| Jun | 27.3 °C | +1.8 °C | 141 mm | -3 mm |
| Jul | 30.8 °C | +3.2 °C | 224 mm | -77 mm |
| Aug | 30.2 °C | +1.9 °C | 170 mm | -43 mm |
| Sep | 25.7 °C | +1.7 °C | 265 mm | +119 mm |
| Oct | 19.3 °C | +1.1 °C | 183 mm | +127 mm |
| Nov | 12.7 °C | +2.3 °C | 16 mm | -33 mm |
| Dec | 4.3 °C | +1.5 °C | 43 mm | +11 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 Wŏnju?
Wŏnju has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 10.7 °C and it receives 1,248 mm of precipitation per year.
What is the hottest day ever recorded in Wŏnju?
The hottest day measured in Wŏnju between 1940 and 2025 was 1 August 2018, reaching 37.0 °C.
What is the coldest day in Wŏnju?
The coldest day measured in Wŏnju between 1940 and 2025 was 31 January 1941, at -29.7 °C.
Does it snow in Wŏnju?
Yes. Wŏnju gets on average 37.0 cm of snow per year and has around 121 frost days.
Has the climate of Wŏnju warmed?
Yes: Wŏnju warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Wŏnju?
The wettest day measured in Wŏnju between 1940 and 2025 was 19 August 1972, with 186 mm of rain in 24 hours.
What was the windiest day in Wŏnju?
The windiest day measured in Wŏnju between 1940 and 2025 was 7 September 2019, with winds reaching 38.6 km/h.
What is the warmest month in Wŏnju?
The warmest month in Wŏnju is August (24.2 °C on average); the coldest is January (-4.8 °C).
How much does it rain in Wŏnju?
Wŏnju receives on average 1,248 mm of precipitation per year, spread over about 109 rainy days.
Is it sunny in Wŏnju?
Wŏnju gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Wŏnju?
The heaviest 24-hour snowfall measured in Wŏnju between 1940 and 2025 was 28 January 1969, with 20.2 cm.
Are there tropical nights in Wŏnju?
Yes: Wŏnju has on average 42 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Wŏnju?
In Wŏnju, between 1940 and 2025, the highest apparent temperature reached 42.5 °C on 1 August 2018, and the lowest was -34.5 °C on 31 January 1941.
Compare Wŏnju with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Wŏnju