Even by Belgian standards, Bruges has a poor reputation for its weather. Compared to other western European cities like London and Paris, the weather in Bruges is colder and damper. Even in July and August, average daily maximum temperatures struggle to exceed 21°C (70°F) and rainfall averages 203 mm (8 in) a month. In autumn, temperatures drop off quite rapidly and winter months are damp and chilly.
The summer visitor should always be prepared for rain in Bruges and that warm and sunny weather is not constant during that season. The daily and monthly temperature variations are quite small - average highs and average lows don't exceed a range of 9°C (or 16°F).