Seongnam Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Seongnam.
Climate overview of Seongnam
Seongnam, Gyeonggi-do, South Korea, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 3°C (37°F).
The city has a wet climate, receiving around 1281 mm (50 in) of rain/snowfall per year. Despite the high annual total, it has a distinct dry season from December to February. July is the wettest month. The sunniest month is May, with 7.5 hours of sunshine per day on average.
Seongnam Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Seongnam — and find the best time to visit.
Monthly Temperature in Seongnam
Visitors to Seongnam can expect significant temperature changes throughout the year. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 3°C (37°F) in January.
Nighttime temperatures range from 22°C (72°F) in August to -7°C (19°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Seongnam
Seongnam is known for its substantial rain/snowfall, with annual precipitation reaching 1281 mm (50 in). The seasons in Seongnam bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 324 mm (13 in) of precipitation. This rainfall is distributed across 16 rainy days.
In contrast, the driest month, January, experiences much less snow/rainfall, totaling 23 mm (0.9 in) over 7 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Seongnam Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Seongnam
In Seongnam, summer days are longer and more sunny, with daily sunshine hours peaking at 7.5 hours in May. As the darker season arrives, the brightness of the sun becomes less. July sees a soft sun for only 4.1 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Seongnam by Month
The relative humidity is high throughout the year in Seongnam.
The city experiences its highest humidity in July, reaching 77%. In February, the humidity drops to its lowest level at 54%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Seongnam
The average wind speed over the year ranges from 2 m/s (4 knots) to 3 m/s (6 knots). It is lower in January, February, March, May, June, July, August, September, October, November and December and higher in April. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Seongnam
The weather does bring rainfall during this period, between 57 mm (2.2 in) and 145 mm (5.7 in).
Plan accordingly for July and August, when conditions bring the heaviest precipitation. Looking for inspiration on where to travel this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
Frequently asked questions about the climate in Seongnam
What is the best time to visit Seongnam?
October typically offers the most optimal weather in Seongnam. In contrast, January, February, July and August tend to have less optimal conditions. Seongnam has a distinct dry season from December to February.
What temperatures can I expect in Seongnam?
Daytime highs range from 3°C (37°F) in January to 31°C (88°F) in August. Nighttime lows range from -7°C (19°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Seongnam get?
Annual rainfall is around 1281 mm (50 in). July is the wettest month with 324 mm (13 in), while January is the driest with 23 mm (0.9 in).
How sunny is Seongnam?
Seongnam receives around 2,148 hours of sunshine per year. May is the sunniest month with 225 hours, while July is the cloudiest with just 124 hours. Overall, Seongnam enjoys abundant sunshine.
Seongnam 3-Day Forecast
Seongnam 3-Day Forecast
Seongnam on the map
Seongnam is highlighted — select any city to see its climate.
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