Seongnam Weather in September

September in Seongnam brings high temperatures, with daytime highs of 27°C (81°F) and nights around 16°C (61°F). Quite a bit of rainfall is expected, around 136 mm (5.4 in), so pack an umbrella.

Rainfall in Seongnam in September

Typically, about 9 days will experience rainfall, with an average of 136 mm (5.4 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Seongnam in September

Seongnam in September gets highs of 27°C (81°F) during the day and drops to 16°C (61°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Seongnam in September

The city usually sees around 182 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Seongnam in September

Wind speeds average 2 m/s (4 knots) during September. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

For Seongnam itself, October generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.