Hwacheon climate — normals and trends
Hwacheon (South Korea) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 10.0 °C and it receives 1,283 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 (23.7 °C on average) and the coldest is January (-6.0 °C). Rainfall peaks in July.
Hwacheon averages 122 frost days, 15 hot days (≥ 30 °C) and 109 rainy days per year.
Hwacheon has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 135 to 109 per year over the period.
The hottest day of the period reached 37.2 °C (on 1 August 2018) and the coldest -29.9 °C (on 12 January 1943).
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
HwacheonGangwon-do
- coords
- 38.11°, 127.71°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.0°C
Average daily high
14.9°C
Average daily low
5.4°C
Annual rainfall
1,283mm
Sunshine / day
8.5h
Mean relative humidity
72%
Average peak wind
12.0km/h
Seasonal range
29.7°C
Frost days (< 0 °C)
122 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
109 d/yr
Annual snowfall
49.5 cm
Average feels-like high
13.6 °C
Average feels-like low
3.8 °C
Average peak gust
35.4 km/h
Tropical nights (≥ 20 °C)
38 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.58 · 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
37.2 °C
1 August 2018
Coldest day
-29.9 °C
12 January 1943
Wettest day
195 mm
30 July 1945
Windiest day
36.7 km/h
4 May 2016
Strongest gust
116.6 km/h
16 July 1987
Hottest feels-like
42.9 °C
1 August 2018
Coldest feels-like
-35.3 °C
31 January 1941
Snowiest day
24.9 cm
28 February 1956
Sunniest day
14.5 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 | 1.4 °C | +2.2 °C | 20 mm | -5 mm |
| Feb | 1.9 °C | -0.3 °C | 4 mm | -25 mm |
| Mar | 11.1 °C | +2.6 °C | 52 mm | +2 mm |
| Apr | 17.6 °C | +1.6 °C | 98 mm | +17 mm |
| May | 20.5 °C | -0.8 °C | 96 mm | +1 mm |
| Jun | 26.5 °C | +1.7 °C | 167 mm | +24 mm |
| Jul | 29.9 °C | +2.9 °C | 218 mm | -108 mm |
| Aug | 29.6 °C | +1.9 °C | 210 mm | -40 mm |
| Sep | 25.2 °C | +1.8 °C | 266 mm | +117 mm |
| Oct | 18.3 °C | +0.8 °C | 162 mm | +108 mm |
| Nov | 11.9 °C | +2.4 °C | 20 mm | -28 mm |
| Dec | 3.1 °C | +1.3 °C | 45 mm | +15 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 Hwacheon?
Hwacheon has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 10.0 °C and it receives 1,283 mm of precipitation per year.
What is the hottest day ever recorded in Hwacheon?
The hottest day measured in Hwacheon between 1940 and 2025 was 1 August 2018, reaching 37.2 °C.
What is the coldest day in Hwacheon?
The coldest day measured in Hwacheon between 1940 and 2025 was 12 January 1943, at -29.9 °C.
Does it snow in Hwacheon?
Yes. Hwacheon gets on average 49.5 cm of snow per year and has around 122 frost days.
Has the climate of Hwacheon warmed?
Yes: Hwacheon warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hwacheon?
The wettest day measured in Hwacheon between 1940 and 2025 was 30 July 1945, with 195 mm of rain in 24 hours.
What was the windiest day in Hwacheon?
The windiest day measured in Hwacheon between 1940 and 2025 was 4 May 2016, with winds reaching 36.7 km/h.
What is the warmest month in Hwacheon?
The warmest month in Hwacheon is August (23.7 °C on average); the coldest is January (-6.0 °C).
How much does it rain in Hwacheon?
Hwacheon receives on average 1,283 mm of precipitation per year, spread over about 109 rainy days.
Is it sunny in Hwacheon?
Hwacheon 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 Hwacheon?
The heaviest 24-hour snowfall measured in Hwacheon between 1940 and 2025 was 28 February 1956, with 24.9 cm.
Are there tropical nights in Hwacheon?
Yes: Hwacheon has on average 38 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hwacheon?
In Hwacheon, between 1940 and 2025, the highest apparent temperature reached 42.9 °C on 1 August 2018, and the lowest was -35.3 °C on 31 January 1941.
Compare Hwacheon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hwacheon