I wouldn't call it tropical and compared to Florida I'm sure you would find it cold but Munich only really goes down to around 0 at night at the coldest and is around 10 or so during the day. Compared to Canadian winters it's quite nice. Try to keep warm and have hot drinks to keep your immune system up. You can crash after exams.
Mel, you are more charitable than my wife about substitute teachers. She finds that they don't follow her instructions and lesson plans and they end up being so far behind. It's frustrating for her since she is so conscientious. I see her spend an hour or two working on detailed lesson plans for the sub while having 102 fever and being really sick, only to have them ignored. It drives her mad! I'm sure you're happy to be back in the class again. Not to knock the subs, but if you want anything done right, you need to do it yourself! Try to stay as well rested as possible to allow yourself to fully recover(I know, easier said than done but I said TRY).