Recent numerical weather prediction ensembles from the ECMWF and GFS, updated within the past 48 hours, show Shanghai under persistent cloud cover and scattered showers tied to the mei-yu front, keeping the June 23 daytime maximum near 24–25 °C. This aligns with the market’s tight clustering around those outcomes, reflecting model consensus on limited solar heating and elevated boundary-layer moisture during the East Asian summer monsoon. Historical June climatology places average highs near 27–28 °C, but the current pattern favors suppressed temperatures by 2–3 °C through reduced insolation and evaporative cooling from rainfall. Traders weigh the narrow spread between 24 °C and 25 °C against potential model timing differences in any convective cells and the precise strength of onshore flow, with the next high-resolution runs and China Meteorological Administration guidance expected to refine the outcome before resolution.