Weather can make or break a road trip, so here's some data about year-round temperatures in Lantry to help you plan yours: The hottest months are usually July and August, with an average temperature of 22°C, while the coldest months are January and February, with an average of -4°C. The snowiest months in Lantry are December, March, April and February, with each month seeing an average of 24 cm of snowfall.