If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Gander: The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and January, with an average of -5°C. The snowiest months in Gander are February, December, November and March, with each month seeing an average of 68 cm of snowfall.