Current short-range forecasts from the Korea Meteorological Administration point to an overnight low near 20°C in Seoul on June 17, with model consensus supporting the tight clustering of market probabilities around 19–21°C. Mild early-summer conditions, elevated humidity, and increasing cloud cover are limiting radiative cooling compared with clearer nights earlier in the month, while daytime highs near 32–34°C sustain residual warmth into the early morning hours. Historical mid-June lows average 17–19°C, but recent model runs show a modest upward shift due to a stable high-pressure pattern and light winds. Traders appear to weigh the narrow range of ensemble guidance against the potential for minor forecast revisions in the final 48 hours before resolution.