Korea Meteorological Administration's latest short-term forecast indicates Busan will see a daytime high near 22°C on April 18, driven by moderate southerly winds and partial cloud cover, aligning with trader consensus at 37.5% implied probability for 22°C versus 27.5% for 21°C. This positioning follows a warm spell earlier in the week, including a 26°C peak on April 13 amid retreating cold air masses typical of mid-spring transition, but recent model runs suggest slight cooling from increased low-level moisture and possible sea breeze effects that could cap temperatures at 21°C. Ensemble forecasts from KMA show minimal divergence, with genuine uncertainty around afternoon cloud development; key updates expected in evening advisories ahead of resolution based on official observations at Busan station. Historical April averages hover around 18°C, contextualizing the mild conditions.