Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
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 excellent 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.
Osan Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
25°C (77°F)
Chance of Rain
26%
Precipitation
91 mm (3.6 in)
Rainy days
8 days
Humidity
65% *
Sunshine
248 hours *
Percentage Sunshine
56% *
* Data from: Cheonan, South Korea (38 KM, 23 Miles).
Osan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Osan - and find the best time to visit.
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 →
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.
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Swimming9/10 -
Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports9/10
Osan 3-Day Forecast
More climate data for Osan
Temperature Rainfall Sunshine Humidity
See the full Osan climate overview or explore weather in South Korea.
Popular in May
Where to go in May - average daytime high across popular destinations.
Seoul
24°C (75°F) Jeonju25°C (77°F) Suwon24°C (75°F) Gyeongju25°C (77°F) Seogwipo
22°C (72°F) Incheon21°C (70°F) Busan22°C (72°F) Jeju20°C (68°F) Bucket list
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Mud festival in South Korea
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