If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Einsiedeln: The hottest months are usually August and July with an average temp of 46°F, while the coldest months are January and February with an average of 19°F. The rainiest months in Einsiedeln are August, June, July, and May, with each month seeing an average of 13 inches of rainfall.