Will the highest temperature in Seoul be 18°C or higher on April 21?

Analysis

Seoul just dropped from 29°C to 15°C in two days — that's not a gentle cooling trend, that's a proper cold front moving through. The forecast range might technically include warmer outcomes, but the conditions on the ground tell a different story. Northwest winds and yellow dust systems aren't exactly the recipe for a spring warm-up. The Korea Meteorological Administration and the major weather models are clustering around 15-17°C for a reason — they're reading the same atmospheric signals that suggest this chill is sticking around. Sure, some analysts are pointing to urban heat effects and the possibility of clearer skies pushing temperatures higher. Seoul's spring weather can surprise, and the upper end of the forecast technically reaches 22°C. But betting on a quick rebound after such a dramatic cooldown feels like wishful thinking. The cooling momentum looks too strong to reverse in just one day. When you've got consistent northwest winds and specific weather systems keeping a lid on things, the path of least resistance is staying below that 18°C threshold. I'd skip the warm-day bet here — the cold front has real teeth and it's not done yet.