Visiting local bars in Siauliai is more fun when you know what the weather holds. These rainfall averages and temperatures can help you determine the best time for bar hopping. The hottest months are usually July and August with an average temp of 61°F, while the coldest months are January and February with an average of 29°F. The snowiest months in Siauliai are January, February, December, and November, with each month seeing an average of 14 inches of snowfall.