If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Flueelen: The hottest months are usually July and August, with an average temperature of 15°C, while the coldest months are January and February, with an average of 0°C. The rainiest months in Flueelen are August, July, June and May, with each month seeing an average of 230 mm of rainfall.