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 June, with an average temperature of 20°C, while the coldest months are January and December, with an average of 0°C. The snowiest months in Santa Fe are January, December, November and March, with each month seeing an average of 20 cm of snowfall.