Temperature
Hot by day, warm at night.
Nantong is most comfortable in April and October. Summers are hot and winters are cool. The wetter months are roughly March to September.

Hot by day, warm at night.
Rain is especially frequent this month.
Cloudier spells limit sunshine.
Hot days with humid air through much of the month.
In August, afternoons feel about 88° and nights feel near 92°.
Mostly cloudy skies.
August late afternoons are around 80°F, and early evening stays near 79°F.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Nantong with Shanghai.
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: Jul 27, 2026
Data & methodology