Planning for the weather is a good way to make your trip to Westendorf relaxing and enjoyable, especially when you're splurging. 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.