Weather will likely play an important role when you plan your trip to Alsacia, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and September, with an average temperature of 17°C, while the coldest months are January and December, with an average of 16°C. The rainiest months in Alsacia are May, April, October and June, with each month seeing an average of 757 mm of rainfall.