Planning for the weather is a good way to make your trip to Colby relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 24°C, while the coldest months are January and February, with an average of 2°C. The snowiest months in Colby are January, December, March and November, with each month seeing an average of 15 cm of snowfall.