Hongseong climate — normals and trends
Hongseong (South Korea) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 12.4 °C and it receives 1,185 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 (25.7 °C on average) and the coldest is January (-1.6 °C). Rainfall peaks in July.
Hongseong averages 97 frost days, 29 hot days (≥ 30 °C) and 103 rainy days per year.
Hongseong has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 107 to 87 per year over the period.
The hottest day of the period reached 38.4 °C (on 1 August 2018) and the coldest -19.7 °C (on 25 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
HongseongChungcheongnam-do
- coords
- 36.60°, 126.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.4°C
Average daily high
17.0°C
Average daily low
8.4°C
Annual rainfall
1,185mm
Sunshine / day
8.7h
Mean relative humidity
73%
Average peak wind
15.0km/h
Seasonal range
27.3°C
Frost days (< 0 °C)
97 d/yr
Hot days (≥ 30 °C)
29 d/yr
Rainy days (≥ 1 mm)
103 d/yr
Annual snowfall
22.0 cm
Average feels-like high
16.2 °C
Average feels-like low
6.9 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
63 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.48 · 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
38.4 °C
1 August 2018
Coldest day
-19.7 °C
25 January 1941
Wettest day
216 mm
30 September 1998
Windiest day
56.9 km/h
28 August 2012
Strongest gust
129.6 km/h
28 August 2012
Hottest feels-like
44.7 °C
1 August 2018
Coldest feels-like
-24.9 °C
25 January 1941
Snowiest day
18.9 cm
7 January 2001
Sunniest day
14.1 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 | 4.5 °C | +2.2 °C | 25 mm | -2 mm |
| Feb | 4.0 °C | -0.6 °C | 12 mm | -18 mm |
| Mar | 13.0 °C | +2.7 °C | 49 mm | -1 mm |
| Apr | 18.6 °C | +1.3 °C | 67 mm | -12 mm |
| May | 22.0 °C | -0.7 °C | 92 mm | +6 mm |
| Jun | 27.5 °C | +1.2 °C | 198 mm | +64 mm |
| Jul | 31.9 °C | +3.4 °C | 219 mm | -55 mm |
| Aug | 31.3 °C | +1.8 °C | 194 mm | -28 mm |
| Sep | 27.1 °C | +1.7 °C | 316 mm | +164 mm |
| Oct | 21.0 °C | +1.4 °C | 191 mm | +137 mm |
| Nov | 14.5 °C | +2.2 °C | 18 mm | -30 mm |
| Dec | 6.5 °C | +1.4 °C | 37 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 Hongseong?
Hongseong has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 1,185 mm of precipitation per year.
What is the hottest day ever recorded in Hongseong?
The hottest day measured in Hongseong between 1940 and 2025 was 1 August 2018, reaching 38.4 °C.
What is the coldest day in Hongseong?
The coldest day measured in Hongseong between 1940 and 2025 was 25 January 1941, at -19.7 °C.
Does it snow in Hongseong?
Yes. Hongseong gets on average 22.0 cm of snow per year and has around 97 frost days.
Has the climate of Hongseong warmed?
Yes: Hongseong warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hongseong?
The wettest day measured in Hongseong between 1940 and 2025 was 30 September 1998, with 216 mm of rain in 24 hours.
What was the windiest day in Hongseong?
The windiest day measured in Hongseong between 1940 and 2025 was 28 August 2012, with winds reaching 56.9 km/h.
What is the warmest month in Hongseong?
The warmest month in Hongseong is August (25.7 °C on average); the coldest is January (-1.6 °C).
How much does it rain in Hongseong?
Hongseong receives on average 1,185 mm of precipitation per year, spread over about 103 rainy days.
Is it sunny in Hongseong?
Hongseong gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hongseong?
The heaviest 24-hour snowfall measured in Hongseong between 1940 and 2025 was 7 January 2001, with 18.9 cm.
Are there tropical nights in Hongseong?
Yes: Hongseong has on average 63 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hongseong?
In Hongseong, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 1 August 2018, and the lowest was -24.9 °C on 25 January 1941.
Compare Hongseong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hongseong