The weather of Hanover is relatively moderate year round. It’s cold & grey during December to February whereas July and August are on little hotter side. Rainfall happens at any time of the year, there is no such fixed monsoon season.
Summer (May-September): This time is considered to be the best time to visit Hanover. Temperature goes as low as 8 degree Celsius and high up to 24 degree Celsius. Summers drive in lots of tourists and the city is very crowded because of the various festivals that occur in Hanover.
Spring (March & April): This time is often considered to be the best time for getting involved in outdoor activities in Hanover. As the winter settles down it makes the weather suitable for going outside and relaxing. Temperature at this time varies from 0 degree Celsius to 10 degree Celsius.
Autumn: Autumn is always buzzing with many events taking place in Hanover. In the month of October & November the temperature shuffles between 8 degree Celsius to 20 degree Celsius.
Winter: Winter is usually in the month of December to February and the temperature is very cold and snowy which is most of the time below 0 degree Celsius.
So, the best time to visit Hanover is in the months of March to June.