The highest day temperature in July 2025 was 95°F. The lowest night temperature was 70°F. The average values for day and night temperatures during July were 90.4°F и 75.6°F respectivly.

The average sea surface temperature in July 2025 for Hiroshima was 85.1°F. The maximum and minimum values were 82.0°F and 88.2°F respectively.

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

Precipitation total in July for Hiroshima is 9.1 in. It makes july the most rainy month of the year.

The average wind speed in July is 4.1 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 Hiroshima in July is 7.7 hours.