Two European summers, one week apart

Chamonix climbs past 26°C this week under clear skies. Tromso sits near 10°C at the same moment, with drizzle and a 23 km/h wind off the fjord. Same continent, same week. If your summer trek heads to Arctic Norway rather than the Alps, pack for autumn: a waterproof shell, a warm midlayer, gloves you would leave at home in Chamonix. The rain holds — Wednesday drops over 20mm on Tromso.