Seongnam-si weather
At 4:00 AM local time it was cloudy and 6°C (42°F). Mostly light, on-and-off rain; heavier around 4 PM (5.6 mm total). Best months for weather: May–Jun, Oct. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Seongnam-si, Gyeonggi-do, South Korea.
Current conditions
- Clouds
- 91%
- Chance of rain
- 2%
- Rain
- 0.0 mm/h
Hourly Forecast
Mostly light, on-and-off rain; heavier around 4 PM (5.6 mm total)
Daily Forecast
Best Time to Visit
Peak season May–Jun, OctOff season Feb, Jul–Aug
About Seongnam-si weather
Is it raining in Seongnam-si right now?
No. It’s cloudy and 6° right now. Mostly light, on-and-off rain; heavier around 4 PM (5.6 mm total).
What’s the weather like in Seongnam-si this week?
Over the next 7 days, expect highs of 6–16° and lows of -2–10°. Rain is likely on 2 of 7 days (Sunday, Thursday). The driest day looks like Tuesday.
Has it been raining in Seongnam-si lately?
Barely. The past 7 days were mostly dry, with 0.1 mm of rain in total.
What should I pack for Seongnam-si?
For the coming week, bring an umbrella or rain jacket and a warm winter coat.
Seongnam-si weather by month
When is the best time to visit Seongnam-si?
Based on weather alone, the best time to visit Seongnam-si is May–Jun, Oct, according to NASA's 2001–2025 climate averages. Feb, Jul–Aug tends to be the least pleasant. Average highs run from 1°C (33°F) in January to 28°C (83°F) in August.
What is the rainiest month in Seongnam-si?
July is the wettest month, with about 361 mm (14.2 in) of rain on average. January is the driest, with about 20 mm (0.8 in).
What is the hottest month in Seongnam-si?
August is the warmest, with average highs of 28°C (83°F) and lows of 22°C (71°F). January is the coolest, with highs of 1°C (33°F) and lows of -7°C (19°F).
Does Seongnam-si have a rainy season?
Yes. Jul–Aug is the rainy season (150 mm or more a month), while Oct–Mar is usually dry (under 60 mm).
Seongnam-si weather month by month
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months