Taking the local weather in Dillon into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are December and January, with an average of -9°C. The snowiest months in Dillon are January, February, April and December, with each month seeing an average of 65 cm of snowfall.