Taking the local weather in Arran-Elderslie 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 18°C, while the coldest months are February and January, with an average of -4°C. The snowiest months in Arran-Elderslie are January, February, December and November, with each month seeing an average of 58 cm of snowfall.