1/ Carefully survey the weather forecast
Before each outing in the mountains, it is important to study the weather in detail. A clear blue sky at the start of your hike can turn into wet weather on the way. To complete the basic data dealing with the ups and downs of the weather (rain, fog, wind, etc.) and temperature, cast an eye over the sunrise and sunset times.
By the end of August, the days are getting shorter and night falls much sooner than you might think, so you need to plan a route that will get you home before dark, or be equipped accordingly. So, even if you plan to be home before the sun sets, always take a headlamp in your bag.