You might spend a lot of your holiday inside, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually August and July, with an average temperature of 16°C, while the coldest months are February and January, with an average of -5°C. The snowiest months in Christmas are January, April, November and March, with each month seeing an average of 58 cm of snowfall.