Koksan Weather in May
What's the weather like in Koksan (Hwanghae-bukto) in May 2026?
The climate in Koksan during May can be summarized as mild and a little damp.
May is in the spring in Koksan and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 20.4°C 68.7°F |
|---|---|
| Nightly temperature | 8.8°C 47.8°F |
| Average temperature | 14.6°C 58.3°F |
| Daily sunshine | 8.7 hrs |
| Avg rainfall | 84 mm 3.3 ins |
| Rainy days | 9 days |
| Sea temperature | 12°C 53.5°F |
| Humidity | 67% |
| Windspeed | 10.4kph 7 mph |
On average May is the 5th wettest month of the year in Koksan with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.7 hours of sunshine per day.
May temperatures in Koksan
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Koksan in May 2025.
Other monthly averages
Koksan weather stats
| Hottest month: | August | 26.7°C 80.1°F |
|---|---|---|
| Driest month: | January | 19mm 0.7ins |
| Sunniest month: | March | 7.8hrs |
| Coldest month: | January | -2.3°C 27.9°F |
| Wettest month: | July | 332mm 13.1ins |
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