The highest day temperature in July 2025 was 101°F. The lowest night temperature was 79°F. The average values for day and night temperatures during July were 94.0°F и 82.5°F respectivly.

The average sea surface temperature in July 2025 for Nantong was 88.2°F. The maximum and minimum values were 84.8°F and 90.0°F respectively.

You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in July for Nantong is 5.9 in. It makes july the most rainy month of the year.

The average wind speed in July is 9.0 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Nantong in July is 7.6 hours.