It’s Not the Heat, It’s the Rain and the AC! Seoul Weather in August and September—Double Tokyo’s Rainfall, 95°F Outside and 72°F Inside, and Exactly What to Pack
On paper Tokyo runs slightly hotter. Here’s the thing: what makes Seoul punishing is 348.2mm of August rain, more than double Tokyo—and the indoor swing, 95°F outside to 72°F in a cafe, a dozen times a day. Shorts through September 20, one thin layer for the AC, a compact umbrella from home, and where to cool down for free.