Naesŏ climate — normals and trends
Naesŏ (South Korea) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.6 °C and it receives 1,186 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 (26.1 °C on average) and the coldest is January (0.7 °C). Rainfall peaks in July.
Naesŏ averages 88 frost days, 35 hot days (≥ 30 °C) and 93 rainy days per year.
Naesŏ has warmed by +2.7 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 105 to 71 per year over the period.
The hottest day of the period reached 38.9 °C (on 20 July 1994) and the coldest -16.8 °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
NaesŏGyeongsangnam-do
- coords
- 35.25°, 128.52°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.6°C
Average daily high
18.7°C
Average daily low
9.1°C
Annual rainfall
1,186mm
Sunshine / day
8.8h
Mean relative humidity
69%
Average peak wind
14.3km/h
Seasonal range
25.4°C
Frost days (< 0 °C)
88 d/yr
Hot days (≥ 30 °C)
35 d/yr
Rainy days (≥ 1 mm)
93 d/yr
Annual snowfall
6.3 cm
Average feels-like high
18.0 °C
Average feels-like low
7.8 °C
Average peak gust
34.8 km/h
Tropical nights (≥ 20 °C)
67 d/yr
Solar radiation
15.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °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
38.9 °C
20 July 1994
Coldest day
-16.8 °C
6 February 1969
Wettest day
227 mm
26 September 1944
Windiest day
66.8 km/h
31 August 1987
Strongest gust
171.0 km/h
16 July 1987
Hottest feels-like
44.5 °C
7 July 2025
Coldest feels-like
-22.9 °C
6 February 1969
Snowiest day
15.0 cm
18 February 1986
Sunniest day
13.9 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 | 7.7 °C | +1.7 °C | 8 mm | -17 mm |
| Feb | 7.5 °C | -0.7 °C | 27 mm | -10 mm |
| Mar | 15.2 °C | +2.1 °C | 65 mm | -1 mm |
| Apr | 21.1 °C | +2.3 °C | 57 mm | -46 mm |
| May | 22.9 °C | -0.6 °C | 148 mm | +42 mm |
| Jun | 28.4 °C | +2.2 °C | 163 mm | -3 mm |
| Jul | 33.0 °C | +4.2 °C | 145 mm | -84 mm |
| Aug | 32.9 °C | +2.9 °C | 220 mm | +48 mm |
| Sep | 28.7 °C | +2.6 °C | 147 mm | -9 mm |
| Oct | 22.6 °C | +1.5 °C | 114 mm | +57 mm |
| Nov | 16.6 °C | +2.0 °C | 20 mm | -26 mm |
| Dec | 10.3 °C | +2.1 °C | 16 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 Naesŏ?
Naesŏ has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.6 °C and it receives 1,186 mm of precipitation per year.
What is the hottest day ever recorded in Naesŏ?
The hottest day measured in Naesŏ between 1940 and 2025 was 20 July 1994, reaching 38.9 °C.
What is the coldest day in Naesŏ?
The coldest day measured in Naesŏ between 1940 and 2025 was 6 February 1969, at -16.8 °C.
Does it snow in Naesŏ?
Yes. Naesŏ gets on average 6.3 cm of snow per year and has around 88 frost days.
Has the climate of Naesŏ warmed?
Yes: Naesŏ warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Naesŏ?
The wettest day measured in Naesŏ between 1940 and 2025 was 26 September 1944, with 227 mm of rain in 24 hours.
What was the windiest day in Naesŏ?
The windiest day measured in Naesŏ between 1940 and 2025 was 31 August 1987, with winds reaching 66.8 km/h.
What is the warmest month in Naesŏ?
The warmest month in Naesŏ is August (26.1 °C on average); the coldest is January (0.7 °C).
How much does it rain in Naesŏ?
Naesŏ receives on average 1,186 mm of precipitation per year, spread over about 93 rainy days.
Is it sunny in Naesŏ?
Naesŏ gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Naesŏ?
The heaviest 24-hour snowfall measured in Naesŏ between 1940 and 2025 was 18 February 1986, with 15.0 cm.
Are there tropical nights in Naesŏ?
Yes: Naesŏ has on average 67 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Naesŏ?
In Naesŏ, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 7 July 2025, and the lowest was -22.9 °C on 6 February 1969.
Compare Naesŏ with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Naesŏ