Taking the local weather in Trossachs 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 10°C, while the coldest months are January and February, with an average of 1°C. The rainiest months in Trossachs are December, October, January and November, with each month seeing an average of 176 mm of rainfall.