Forecast models from agencies like the China Meteorological Administration indicate Qingdao's July 21 high will likely hover near 30–31°C, with marine air from the Yellow Sea moderating daytime heating under typical summer monsoon flow. Key differentiators include variable cloud cover and potential weak frontal passages that could suppress peaks by 1–2°C or allow brief clear skies to push readings toward 32–33°C; urban heat effects and low wind speeds may add localized warmth. Ensemble guidance shows modest spread due to evolving sea-surface temperatures and upper-level ridging, leaving the 30–31°C outcomes closely contested as new model runs refine boundary-layer moisture and advection patterns ahead of the date.