The highest day temperature in July 2025 was 106°F. The lowest night temperature was 50°F. The average values for day and night temperatures during July were 78.2°F и 60.2°F respectivly.

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

Precipitation total in July for Bonn is 2.5 in. It makes july the most rainy month of the year.

The average wind speed in July is 6.3 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 Bonn in July is 9.1 hours.