Planning for the weather is a good way to make your trip to Irpin relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 67°F, while the coldest months are January and February with an average of 30°F. The snowiest months in Irpin are December, January, February, and March, with each month seeing an average of 11 inches of snowfall.