The highest day temperature in July 2025 was 103°F. The lowest night temperature was 53°F. The average values for day and night temperatures during July were 80.1°F и 62.9°F respectivly.

Most of the days in July are cloudy but you can also expect sunny or gloomy days.

Precipitation total in July for Mainz is 2.0 in. It makes july the most rainy month of the year.

The average wind speed in July is 6.2 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 Mainz in July is 9.7 hours.