Taking into account the local weather in Juneau is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 51°F, while the coldest months are February and December with an average of 23°F. The snowiest months in Juneau are January, February, December, and November, with each month seeing an average of 28 inches of snowfall.