But the statement is perfectly fine. It's not naive. It explains, correctly, why Kapisa stays cool in the summer: The accumulated snow from the winter stays throughout the summer, or most of the summer (that would be in mountains, mostly), and that leads to cool summers. It's exactly the same where I live: Surrounded by snow-covered mountains far into the summer, and even when warm winds come from south-east they have to pass across those mountains - the result: Cooler winds when they arrive here. When the snows finally retreat most of the way and those mountains aren't white anymore we can finally feel the hot winds.