Wertheim-am-Main has a very mild climate with a lot of rainfall throughout the year. The so called driest month also gets a lot of precipitation. The average temperature usually is around 10 – 11 degree Celsius.
The best time to visit Wertheim-am-Main has to be during the summer months of May – August. The temperature is very mild and comfortable during this period, though frequent rainfall may be a nuisance. A lot of tourists are around during this period.