Weather is probably a major factor when you plan your trip to Imst, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July with an average temp of 47°F, while the coldest months are January and February with an average of 19°F. The rainiest months in Imst are June, August, July, and May, with each month seeing an average of 10 inches of rainfall.