Traders have overwhelmingly converged on 25°C as the highest temperature in Seoul on May 17, reflecting the Korea Meteorological Administration’s latest forecast of clear skies, light westerly winds, and stable high-pressure conditions that limit afternoon warming. Official observations place the daytime maximum near this threshold, consistent with climatological norms for mid-May when Seoul’s average high hovers around 24–26°C before the summer monsoon begins. Model consensus from regional ensembles shows minimal spread, with no significant frontal passages or cloud cover expected to alter surface heating. A realistic challenge would require an unforecasted surge in solar radiation or localized urban heat-island effects pushing readings above 25°C, though current surface data and satellite imagery indicate such deviations remain unlikely before the daily maximum is recorded.