Visiting local bars in Spodnja Idrija is better when you know what the weather holds. These temperatures and rainfall averages can help you decide the best time for bar hopping. The hottest months are usually August and July with an average temp of 70°F, while the coldest months are January and February with an average of 41°F. The rainiest months in Spodnja Idrija are November, September, October, and May, with each month seeing an average of 8 inches of rainfall.