You'll likely spend much of your trip indoors, 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 July and August, with an average temperature of 21°C, while the coldest months are December and January, with an average of 1°C. The snowiest months in Carson City are March, February, January and April, with each month seeing an average of 18 cm of snowfall.