You might spend a lot of your vacation inside, but if you're planning to venture beyond the casino, looking at local weather trends is a good idea. The hottest months are usually July and August with an average temp of 64°F, while the coldest months are January and February with an average of 22°F. The snowiest months in Moscow are December, February, January, and November, with each month seeing an average of 20 inches of snowfall.