Planning for the weather is a good way to make your trip to Tunja relaxing and enjoyable, especially when you’re splurging. The hottest months are usually January and February with an average temp of 54°F, while the coldest months are August and January with an average of 54°F. The rainiest months in Tunja are April, November, March, and May, with each month seeing an average of 8 inches of rainfall.