When you're dreaming of a stay in Port Leyden, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually July and August, with an average temperature of 18°C, while the coldest months are January and February, with an average of -4°C. The snowiest months in Port Leyden are March, January, February and December, with each month seeing an average of 27 cm of snowfall.