Visiting local bars in Itter is better when the weather is good. These rainfall averages and temperatures can help you decide the best time for bar-hopping. The hottest months are usually July and August, with an average temperature of 15°C, while the coldest months are January and February, with an average of -1°C. The rainiest months in Itter are May, June, July and August, with each month seeing an average of 197 mm of rainfall.