Taking the local weather in Erl 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 16°C, while the coldest months are January and February, with an average of 0°C. The rainiest months in Erl are May, June, July and August, with each month seeing an average of 219 mm of rainfall.