Live Weather & Forecast
Weather in Osan
Kyeonggi, South Korea · Real-time conditions & 3-day outlook
21°C
Feels like 21°C
69°F / Feels 69°F
Sunny
Osan, Kyeonggi
🌞 Daytime
Updated: 2026-04-15 12:00
Humidity
42%
Wind
11.9 km/h WNW
Wind Gust
13.7 km/h
Pressure
1012 mb
Visibility
14 km
UV Index
6.8
(High)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
5.8°C
Wind Degree
289°
Air Quality Index
US EPA: Moderate
UK DEFRA: Moderate (4)
CO
353.9 μg/m³
NO₂
85.5 μg/m³
O₃
0 μg/m³
SO₂
25.3 μg/m³
PM 2.5
36.8 μg/m³
PM 10
43.5 μg/m³
Weather Alerts 1
Met
· Moderate · Immediate
DryAir Advisory
(1) DryAir Advisory Announcement : 2026-04-14T10:00:00+09:00 Effective humidity of 35% or less is expected for at least 2 days.
Today's Hourly Forecast
24-hour breakdown for Osan, Kyeonggi
12 AM
15°
Clear
1 AM
15°
Clear
2 AM
15°
Clear
3 AM
15°
Clear
4 AM
14°
Clear
5 AM
14°
Clear
6 AM
13°
Sunny
7 AM
14°
Sunny
8 AM
16°
Sunny
9 AM
18°
Sunny
10 AM
20°
Sunny
11 AM
21°
Sunny
12 PM
21°
Sunny
1 PM
23°
Sunny
2 PM
23°
Sunny
3 PM
22°
Sunny
4 PM
22°
Sunny
5 PM
20°
Sunny
6 PM
18°
Sunny
7 PM
16°
Sunny
8 PM
15°
Clear
9 PM
15°
Clear
10 PM
14°
Clear
11 PM
14°
Clear
3-Day Forecast
Daily overview for Osan, Kyeonggi
Today
Sunny
23°
/
13°
🌧️ 0% chance of rain
💧 Avg. humidity: 49%
💨 Max wind: 18.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 05:58 AM
🌇 Sunset: 07:06 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Partly Cloudy
24°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 50%
💨 Max wind: 15.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 05:57 AM
🌇 Sunset: 07:07 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Partly Cloudy
17°
/
12°
🌧️ 0% chance of rain
💧 Avg. humidity: 61%
💨 Max wind: 15.8 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 0.9
🌅 Sunrise: 05:56 AM
🌇 Sunset: 07:08 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Osan
Plan your trip to Osan, South Korea around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Osan?
Current conditions in Osan: Sunny, temperature 21°C, humidity 42%.
What is the best time to visit Osan?
The best time to visit Osan is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Osan?
Osan is located at approximately 37.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Osan?
The wettest period in Osan is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Osan?
For visits to Osan during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Osan in?
Osan is located in South Korea, in the state of Kyeonggi.
What are the public holidays in Osan in 2026?
View the 2026 public holidays for Osan on our Holidays page.
What are the GPS coordinates used for the weather forecast in Osan?
The weather forecast for Osan uses coordinates 37.1499, 127.0775.