Weather will likely play an important role when you plan your trip to Geneva, 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 20°C, while the coldest months are February and January, with an average of 0°C. The snowiest months in Geneva are January, March, December and November, with each month seeing an average of 17 cm of snowfall.