If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Lechaschau: The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and January, with an average of -2°C. The rainiest months in Lechaschau are August, June, May and July, with each month seeing an average of 254 mm of rainfall.