Hwaseong-si climate — normals and trends
Hwaseong-si (South Korea) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 1,262 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 (24.8 °C on average) and the coldest is January (-1.2 °C). Rainfall peaks in July.
Hwaseong-si averages 69 frost days, 1 hot days (≥ 30 °C) and 100 rainy days per year.
Hwaseong-si has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 78 to 60 per year over the period.
The hottest day of the period reached 32.2 °C (on 10 August 2019) and the coldest -17.0 °C (on 5 January 1970).
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
Hwaseong-siGyeonggi-do
- coords
- 37.21°, 126.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
14.1°C
Average daily low
9.7°C
Annual rainfall
1,262mm
Sunshine / day
8.8h
Mean relative humidity
76%
Average peak wind
20.9km/h
Seasonal range
26.0°C
Frost days (< 0 °C)
69 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
100 d/yr
Annual snowfall
19.2 cm
Average feels-like high
13.0 °C
Average feels-like low
7.5 °C
Average peak gust
32.6 km/h
Tropical nights (≥ 20 °C)
72 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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
32.2 °C
10 August 2019
Coldest day
-17.0 °C
5 January 1970
Wettest day
195 mm
11 June 1948
Windiest day
69.3 km/h
7 September 2019
Strongest gust
114.5 km/h
28 August 2012
Hottest feels-like
40.1 °C
14 August 2024
Coldest feels-like
-24.2 °C
5 January 1970
Snowiest day
20.0 cm
28 January 1969
Sunniest day
14.2 h
22 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 | 2.6 °C | +1.3 °C | 21 mm | -7 mm |
| Feb | 1.6 °C | -1.0 °C | 7 mm | -23 mm |
| Mar | 8.4 °C | +1.7 °C | 53 mm | +2 mm |
| Apr | 13.0 °C | +0.8 °C | 105 mm | +13 mm |
| May | 17.4 °C | +0.4 °C | 92 mm | -11 mm |
| Jun | 22.8 °C | +1.7 °C | 138 mm | +1 mm |
| Jul | 28.1 °C | +3.2 °C | 259 mm | -45 mm |
| Aug | 28.4 °C | +1.9 °C | 211 mm | -8 mm |
| Sep | 25.5 °C | +2.1 °C | 305 mm | +159 mm |
| Oct | 19.5 °C | +1.6 °C | 209 mm | +150 mm |
| Nov | 12.7 °C | +1.5 °C | 19 mm | -38 mm |
| Dec | 5.5 °C | +1.0 °C | 45 mm | +10 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 Hwaseong-si?
Hwaseong-si has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 1,262 mm of precipitation per year.
What is the hottest day ever recorded in Hwaseong-si?
The hottest day measured in Hwaseong-si between 1940 and 2025 was 10 August 2019, reaching 32.2 °C.
What is the coldest day in Hwaseong-si?
The coldest day measured in Hwaseong-si between 1940 and 2025 was 5 January 1970, at -17.0 °C.
Does it snow in Hwaseong-si?
Yes. Hwaseong-si gets on average 19.2 cm of snow per year and has around 69 frost days.
Has the climate of Hwaseong-si warmed?
Yes: Hwaseong-si warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hwaseong-si?
The wettest day measured in Hwaseong-si between 1940 and 2025 was 11 June 1948, with 195 mm of rain in 24 hours.
What was the windiest day in Hwaseong-si?
The windiest day measured in Hwaseong-si between 1940 and 2025 was 7 September 2019, with winds reaching 69.3 km/h.
What is the warmest month in Hwaseong-si?
The warmest month in Hwaseong-si is August (24.8 °C on average); the coldest is January (-1.2 °C).
How much does it rain in Hwaseong-si?
Hwaseong-si receives on average 1,262 mm of precipitation per year, spread over about 100 rainy days.
Is it sunny in Hwaseong-si?
Hwaseong-si 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 Hwaseong-si?
The heaviest 24-hour snowfall measured in Hwaseong-si between 1940 and 2025 was 28 January 1969, with 20.0 cm.
Are there tropical nights in Hwaseong-si?
Yes: Hwaseong-si has on average 72 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hwaseong-si?
In Hwaseong-si, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 14 August 2024, and the lowest was -24.2 °C on 5 January 1970.
Compare Hwaseong-si with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hwaseong-si