Trader consensus on Polymarket clusters tightly around 16–22°C for Busan's highest temperature on April 4, reflecting the Korea Meteorological Administration's (KMA) latest short-range forecast models under a dominant high-pressure ridge delivering mostly clear skies and moderate solar heating. Recent nationwide clear conditions over the past 48 hours, including large diurnal swings with morning lows near 8–13°C surging daytime highs to 18–22°C elsewhere, have shaped this positioning amid early spring's continental air masses mixing with Busan's coastal sea breezes, which cap peaks via onshore flow. Ensemble spreads of ±2–3°C across global models like ECMWF and GFS capture the uncertainty in peak heating timing and any afternoon cloud development, with KMA hourly updates through evening poised to refine odds further. Historical early April norms (15–19°C highs) align with this balanced sentiment.