Average temperatures, rainfall and packing tips for Seoul, South Korea in September
🌡️ Avg high
28°C
🌙 Avg low
20°C
🌧️ Rainfall
~213 mm
📊 Warmth rank
#4 of 12
September in Seoul at a glance
September in Seoul is typically hot, with average daytime highs around 28°C and nights near 20°C. Temperature-wise it sits mid-range for Seoul (the 4th warmest month).
September is one of the wetter months in Seoul, with around 213 mm of rain - plan around showers.
What to pack for Seoul in September
Light, breathable clothing (cotton or linen)
Sun protection: hat, sunglasses and SPF
A refillable water bottle
A rain jacket or umbrella - this is one of the wetter months
Seoul - year at a glance
HighLow · September highlighted
Is September a good time to visit Seoul?
🧳 September is one of the most comfortable months to visit Seoul - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, Seoul averages a daytime high of about 28°C and a night-time low of around 20°C, based on recent historical data.
Does it rain in Seoul in September?
September is one of the wetter months in Seoul, with around 213 mm of rain - plan around showers.
Is September a good time to visit Seoul?
September is one of the most comfortable months to visit Seoul - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.