Weather can make or break a road trip, so here's some data about year-round temperatures in Farson to help you plan yours: The hottest months are usually July and August, with an average temperature of 17°C, while the coldest months are January and December, with an average of -8°C. The snowiest months in Farson are March, January, February and April, with each month seeing an average of 28 cm of snowfall.