You'll likely spend much of your trip indoors, but if you want to see more of the area, taking a look at local weather data can help you. The hottest months are usually July and August, with an average temperature of 17°C, while the coldest months are December and February, with an average of -1°C. The snowiest months in Olympic Valley are March, February, January and April, with each month seeing an average of 103 cm of snowfall.