Temperature
Warm by day, warm at night.
Incheon is most comfortable in May and October. Summers are warm and winters are cold. The wettest months are roughly July to August.

Warm by day, warm at night.
One of the wettest months.
Cloudier spells limit sunshine.
Hot afternoons occur, with humid air through much of the month.
In August, afternoons feel about 88° and nights feel near 81°.
Mostly cloudy skies.
August late afternoons are around 83°F, easing to about 79°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Incheon with Barcelona.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology