Frankfurt Travel Guide - Weather
Winter temperatures vary, on average, between 3°C during the day and -2°C at night and average summer temperatures range from 25°C during the day to 15°C at night. Rainfall can be expected throughout the year: for example, it rains on average eight days per month in the springtime and 11 days per month in the summer.
Even with the rainfall being higher in summer, the likelihood of sunshine is also highest in the summer months, with seven to eight hours per day between June and August.