Weather will likely play an important role when you plan your trip to Jackson, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 16°C, while the coldest months are December and January, with an average of -6°C. The snowiest months in Jackson are February, April, October and March, with each month seeing an average of 19 cm of snowfall.