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As a major trade show and convention town, Frankfurt's population swells during March-May and September-October - which just happen to be the best times to visit weatherwise. The solution is to book ahead or stay at places either beneath or beyond the conventioneers' budgets. The winter months (November-February) are prone to storms and freezing temperatures but bring a full social and entertainment schedule and zero tourist crowds. An exception is December when the Christmas market is in full swing, June to August can be rather hot and characterised by afternoon thunderstorms, but on the plus side, much of the action moves outdoors, and cafes, parks and the riverbank bustle with activity.
