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Osan Weather in May

With daytime temperatures of 25°C (77°F) and nighttime lows of 12°C (54°F), May in Osan brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 91 mm (3.6 in) falls on average.

Rainfall in Osan in May

This month experiences about 8 days of rain according to historical data, averaging 91 mm (3.6 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Osan in May

May tends to be one of the perfect months in Osan, with 25°C (77°F) in the afternoon and 12°C (54°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Osan in May

Expect a lot of sunshine this month, with about 248 hours of sun. These sunny conditions add to the overall experience.

If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Osan.

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Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit South Korea, check out our Osan's climate page.

Osan Temperature in May

Min TemperatureMin Temperature 12°C (54°F)  
Max TemperatureMax Temperature 25°C (77°F)  
Chance of RainChance of Rain 26%  
PrecipitationPrecipitation 91 mm (3.6 in)  
Rainy daysRainy days 8 days  
HumidityHumidity 65% *  
SunshineSunshine 248 hours *  
Percentage SunshinePercentage Sunshine 56% *  
* Data from: Cheonan, South Korea (38 KM, 23 Miles).

Best Places in South Korea in May

Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in May →

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Osan in May

For Osan in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Osan in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming
9/10
Cycling
9/10
Walking
9/10
Barbeque
8/10
Camping
8/10
Outdoor sports
9/10

Select a Month

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit South Korea, check out our Osan's climate page.

More climate data for Osan