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 Westendorf: The hottest months are usually August and July, with an average temperature of 14°C, while the coldest months are January and February, with an average of -2°C. The rainiest months in Westendorf are May, June, July and August, with each month seeing an average of 197 mm of rainfall.