Weather is probably a major factor when you plan your trip to Fischen im Allgaeu, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 16°C, while the coldest months are January and February, with an average of 0°C. The rainiest months in Fischen im Allgaeu are August, May, June and July, with each month seeing an average of 186 mm of rainfall.