Planning for the weather is an important factor for making your trip to Zaysan a success, especially when you're splurging. The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of -10°C. The snowiest months in Zaysan are February, January, December and March, with each month seeing an average of 53 cm of snowfall.