Taking into account the local weather in Brülisau is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and July with an average temp of 52°F, while the coldest months are January and February with an average of 24°F. The rainiest months in Brülisau are August, July, June, and May, with each month seeing an average of 11 inches of rainfall.