Weather
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 more damp. 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. (http://goeurope.about.com...) After October, 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.
Also note that the daily and monthly temperature variations are quite small. Daily differences between average highs and average lows don't exceed 9 C 30 F.
Talk
As Bruges is a part of western Flanders, the main everyday language is West Flemish, which is a distinct dialect of Dutch. However, standard Dutch is the official language and fluently spoken by virtually everyone, and English is also widely spoken. Also quite prevalent is German, but French is not. Languages related to Dutch may often work as well.