The highest day temperature in July 2025 was 94°F. The lowest night temperature was 79°F. The average values for day and night temperatures during July were 89.4°F и 80.7°F respectivly.

The average sea surface temperature in July 2025 for Nagasaki was 87.1°F. The maximum and minimum values were 84.2°F and 89.0°F respectively.

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

Precipitation total in July for Nagasaki is 11.9 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 7.7 mph. It makes July one of the most windless months of the year for Nagasaki.

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 Nagasaki in July is 7.8 hours.