Hwasun climate — normals and trends
Hwasun (South Korea) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.7 °C and it receives 1,296 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 (25.5 °C on average) and the coldest is January (-0.3 °C). Rainfall peaks in July.
Hwasun averages 99 frost days, 30 hot days (≥ 30 °C) and 108 rainy days per year.
Hwasun has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 113 to 85 per year over the period.
The hottest day of the period reached 38.7 °C (on 19 July 1994) and the coldest -19.4 °C (on 8 January 2021).
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
HwasunJeollanam-do
- coords
- 35.06°, 126.99°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.7°C
Average daily high
17.8°C
Average daily low
8.3°C
Annual rainfall
1,296mm
Sunshine / day
8.5h
Mean relative humidity
75%
Average peak wind
14.7km/h
Seasonal range
25.8°C
Frost days (< 0 °C)
99 d/yr
Hot days (≥ 30 °C)
30 d/yr
Rainy days (≥ 1 mm)
108 d/yr
Annual snowfall
13.0 cm
Average feels-like high
17.1 °C
Average feels-like low
7.0 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
61 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.62 · 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
38.7 °C
19 July 1994
Coldest day
-19.4 °C
8 January 2021
Wettest day
182 mm
24 June 1985
Windiest day
56.5 km/h
28 August 2012
Strongest gust
157.7 km/h
28 August 2012
Hottest feels-like
43.8 °C
15 August 1954
Coldest feels-like
-25.0 °C
8 January 2021
Snowiest day
13.1 cm
11 February 1994
Sunniest day
13.8 h
24 June 1958
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 6.1 °C | +1.8 °C | 18 mm | -12 mm |
| Feb | 5.2 °C | -1.2 °C | 36 mm | -3 mm |
| Mar | 13.9 °C | +2.2 °C | 50 mm | -15 mm |
| Apr | 19.9 °C | +2.0 °C | 59 mm | -41 mm |
| May | 22.3 °C | -0.5 °C | 119 mm | +9 mm |
| Jun | 28.0 °C | +2.1 °C | 188 mm | -0 mm |
| Jul | 32.2 °C | +3.7 °C | 162 mm | -111 mm |
| Aug | 31.5 °C | +1.9 °C | 232 mm | +32 mm |
| Sep | 27.8 °C | +2.1 °C | 196 mm | +40 mm |
| Oct | 22.3 °C | +1.9 °C | 154 mm | +99 mm |
| Nov | 15.5 °C | +1.9 °C | 23 mm | -29 mm |
| Dec | 8.9 °C | +2.0 °C | 22 mm | -7 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 Hwasun?
Hwasun has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 12.7 °C and it receives 1,296 mm of precipitation per year.
What is the hottest day ever recorded in Hwasun?
The hottest day measured in Hwasun between 1940 and 2025 was 19 July 1994, reaching 38.7 °C.
What is the coldest day in Hwasun?
The coldest day measured in Hwasun between 1940 and 2025 was 8 January 2021, at -19.4 °C.
Does it snow in Hwasun?
Yes. Hwasun gets on average 13.0 cm of snow per year and has around 99 frost days.
Has the climate of Hwasun warmed?
Yes: Hwasun warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hwasun?
The wettest day measured in Hwasun between 1940 and 2025 was 24 June 1985, with 182 mm of rain in 24 hours.
What was the windiest day in Hwasun?
The windiest day measured in Hwasun between 1940 and 2025 was 28 August 2012, with winds reaching 56.5 km/h.
What is the warmest month in Hwasun?
The warmest month in Hwasun is August (25.5 °C on average); the coldest is January (-0.3 °C).
How much does it rain in Hwasun?
Hwasun receives on average 1,296 mm of precipitation per year, spread over about 108 rainy days.
Is it sunny in Hwasun?
Hwasun 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 Hwasun?
The heaviest 24-hour snowfall measured in Hwasun between 1940 and 2025 was 11 February 1994, with 13.1 cm.
Are there tropical nights in Hwasun?
Yes: Hwasun has on average 61 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hwasun?
In Hwasun, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 15 August 1954, and the lowest was -25.0 °C on 8 January 2021.
Compare Hwasun with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hwasun