Osan Weather in April
What's the weather like in Osan (Gyeonggi Province) in April 2025?
The climate in Osan during April can be summarized as mild and a little damp.
April is in the spring in Osan and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 5°C (41°F) is normal.
| Daytime temperature | 17.8°C 64°F |
|---|---|
| Nightly temperature | 5°C 41°F |
| Average temperature | 11.4°C 52.5°F |
| Daily sunshine | 8.3 hrs |
| Avg rainfall | 93 mm 3.7 ins |
| Rainy days | 8 days |
| Sea temperature | 8.8°C 47.9°F |
| Humidity | 67% |
| Windspeed | 7.6kph 5 mph |
On average April is the 5th wettest month of the year in Osan with around 93mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.3 hours of sunshine per day.
April temperatures in Osan
April rainfall
April 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 Osan in April 2025.
Other monthly averages
Osan weather stats
| Hottest month: | August | 29.6°C 85.3°F |
|---|---|---|
| Driest month: | December | 25mm 1ins |
| Sunniest month: | October | 7.5hrs |
| Coldest month: | January | 1.2°C 34.2°F |
| Wettest month: | July | 309mm 12.2ins |
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