Weatheo

Sa-ch’on Weather by Month

Average temperatures, rainfall and humidity for Sa-ch’on, South Korea, month by month, built from OpenWeather’s historical records. Use it to see what a typical Sa-ch’on month looks like before you travel — then check the live Sa-ch’on forecast for the days ahead.

Warmest month

August

32°C average high

Coolest month

January

-5°C average low

Wettest month

August

92 mm of rain

Driest month

December

13 mm of rain

Average temperature and rainfall in Sa-ch’on by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January7°C-5°C-17°C / 18°C
14 mm
56%9 km/h
February9°C-2°C-12°C / 22°C
26 mm
56%9 km/h
March15°C3°C-7°C / 27°C
50 mm
59%8 km/h
April20°C8°C-1°C / 30°C
72 mm
61%8 km/h
May25°C13°C2°C / 35°C
56 mm
63%7 km/h
June28°C18°C7°C / 37°C
74 mm
71%7 km/h
July30°C23°C3°C / 38°C
89 mm
78%8 km/h
August32°C23°C13°C / 38°C
92 mm
76%7 km/h
September27°C18°C8°C / 38°C
76 mm
76%7 km/h
October22°C11°C-1°C / 31°C
50 mm
70%8 km/h
November15°C4°C-8°C / 26°C
25 mm
64%8 km/h
December8°C-3°C-14°C / 18°C
13 mm
59%8 km/h

Best time to visit Sa-ch’on

The most comfortable time to visit Sa-ch’on is generally May and September to October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around August, totalling about 638 mm a year.

Travellers who prefer heat should aim for August, when highs average 32°C. August is the month to avoid if rain would spoil your plans — it averages 92 mm, roughly 7× the rainfall of the driest month (December).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Sa-ch’on forecast for what is happening now.

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