You might spend a lot of your holiday inside, but if you want to see more of the area, looking at local weather trends is a good idea. The hottest months are usually July and August, with an average temperature of 22°C, while the coldest months are January and December, with an average of -1°C. The snowiest months in Sandy are April, January, March and February, with each month seeing an average of 24 cm of snowfall.