Planning for the weather is a good way to make your trip to Kirn relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 13°C, while the coldest months are February and January, with an average of 5°C. The rainiest months in Kirn are October, December, November and January, with each month seeing an average of 188 mm of rainfall.