Gyeongsan-si climate — normals and trends
Gyeongsan-si (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 1,033 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 (-0.9 °C). Rainfall peaks in July.
Gyeongsan-si averages 101 frost days, 38 hot days (≥ 30 °C) and 90 rainy days per year.
Gyeongsan-si has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 118 to 84 per year over the period.
The hottest day of the period reached 39.2 °C (on 24 August 1967) and the coldest -20.5 °C (on 6 February 1969).
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
Gyeongsan-siGyeongsangbuk-do
- coords
- 35.82°, 128.74°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.7°C
Average daily high
18.0°C
Average daily low
8.0°C
Annual rainfall
1,033mm
Sunshine / day
8.6h
Mean relative humidity
68%
Average peak wind
13.5km/h
Seasonal range
26.4°C
Frost days (< 0 °C)
101 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
90 d/yr
Annual snowfall
11.7 cm
Average feels-like high
16.9 °C
Average feels-like low
6.6 °C
Average peak gust
37.0 km/h
Tropical nights (≥ 20 °C)
56 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.74 · 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
39.2 °C
24 August 1967
Coldest day
-20.5 °C
6 February 1969
Wettest day
150 mm
12 September 2003
Windiest day
51.1 km/h
31 August 1987
Strongest gust
159.5 km/h
16 July 1987
Hottest feels-like
43.7 °C
29 July 1951
Coldest feels-like
-26.0 °C
6 February 1969
Snowiest day
22.5 cm
9 December 1952
Sunniest day
14.0 h
23 June 1942
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 | 6.0 °C | +1.8 °C | 6 mm | -17 mm |
| Feb | 6.0 °C | -0.7 °C | 18 mm | -14 mm |
| Mar | 14.7 °C | +2.6 °C | 60 mm | +2 mm |
| Apr | 21.1 °C | +2.5 °C | 54 mm | -28 mm |
| May | 23.2 °C | -0.5 °C | 105 mm | +16 mm |
| Jun | 29.2 °C | +2.4 °C | 168 mm | +33 mm |
| Jul | 32.5 °C | +3.6 °C | 182 mm | -25 mm |
| Aug | 33.2 °C | +3.3 °C | 120 mm | -37 mm |
| Sep | 28.1 °C | +2.9 °C | 125 mm | -14 mm |
| Oct | 20.8 °C | +0.7 °C | 126 mm | +74 mm |
| Nov | 15.3 °C | +2.0 °C | 16 mm | -24 mm |
| Dec | 8.4 °C | +1.9 °C | 17 mm | -4 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 Gyeongsan-si?
Gyeongsan-si has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 12.7 °C and it receives 1,033 mm of precipitation per year.
What is the hottest day ever recorded in Gyeongsan-si?
The hottest day measured in Gyeongsan-si between 1940 and 2025 was 24 August 1967, reaching 39.2 °C.
What is the coldest day in Gyeongsan-si?
The coldest day measured in Gyeongsan-si between 1940 and 2025 was 6 February 1969, at -20.5 °C.
Does it snow in Gyeongsan-si?
Yes. Gyeongsan-si gets on average 11.7 cm of snow per year and has around 101 frost days.
Has the climate of Gyeongsan-si warmed?
Yes: Gyeongsan-si warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gyeongsan-si?
The wettest day measured in Gyeongsan-si between 1940 and 2025 was 12 September 2003, with 150 mm of rain in 24 hours.
What was the windiest day in Gyeongsan-si?
The windiest day measured in Gyeongsan-si between 1940 and 2025 was 31 August 1987, with winds reaching 51.1 km/h.
What is the warmest month in Gyeongsan-si?
The warmest month in Gyeongsan-si is August (25.5 °C on average); the coldest is January (-0.9 °C).
How much does it rain in Gyeongsan-si?
Gyeongsan-si receives on average 1,033 mm of precipitation per year, spread over about 90 rainy days.
Is it sunny in Gyeongsan-si?
Gyeongsan-si gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gyeongsan-si?
The heaviest 24-hour snowfall measured in Gyeongsan-si between 1940 and 2025 was 9 December 1952, with 22.5 cm.
Are there tropical nights in Gyeongsan-si?
Yes: Gyeongsan-si has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gyeongsan-si?
In Gyeongsan-si, between 1940 and 2025, the highest apparent temperature reached 43.7 °C on 29 July 1951, and the lowest was -26.0 °C on 6 February 1969.
Compare Gyeongsan-si with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gyeongsan-si