Weather is only one factor, but it can really affect your travel plans, especially if you are planning a longer stay in Slingerlands. The hottest months are usually July and August with an average temp of 68°F, while the coldest months are January and February with an average of 29°F. The snowiest months in Slingerlands are January, March, December, and November, with each month seeing an average of 7 inches of snowfall.