Climate Chart of Seoul, South Korea

Climate overview

Temperature

The monthly mean temperature reaches its lowest point at -2.8 °C in January, then its highest at 25.5 °C in August. The unweighted mean across the calendar-month means is 11.9 °C. These are monthly averages, not daytime highs or lows, so they describe the broad temperature pattern rather than the conditions a visitor will encounter on a specific day.

Rain

Mean daily rainfall is lowest at 0.43 mm/day in January and highest at 9.34 mm/day in July; the unweighted mean of the monthly means is 3.15 mm/day. The higher monthly average can help visitors plan to carry rain protection, while the lower one may suit those prioritising less average rainfall. Neither figure tells how often rain falls, guarantees dry weather, or represents a monthly total.

Sunshine

Mean daily sunshine duration peaks at 10.13 hours/day in May and is lowest at 6.95 hours/day in December. Across the calendar months, the unweighted mean of these monthly means is 8.42 hours/day. These figures can help with planning outdoor time, but sunshine duration is not the same as day length and does not promise clear skies on a particular date.

Snow

Mean daily snowfall reaches its highest monthly mean, 1.43 mm/day, in December; the unweighted mean across the monthly means is 0.39 mm/day. These snowfall averages indicate recorded amounts only: they do not establish how many days have snow, snow depth or whether snow cover persists, so they cannot determine conditions for winter activities.