Tight clustering of market-implied probabilities around 19–23°C reflects uncertainty in ensemble weather models for Chengdu's March 27 high temperature, with ECMWF and GFS runs diverging by 2–3°C due to variable cloud cover from an approaching frontal system over Sichuan province. Recent 00Z model updates tilt slightly toward 21–22°C as leading outcomes, driven by southerly winds enhancing warm air advection amid mild La Niña influences lingering into spring. Historical March 27 data from the China Meteorological Administration shows average highs of 19.5°C, but urban heat island effects in Chengdu often push observations 1–2°C above rural baselines. Traders eye afternoon updates from local stations, where solar insolation could differentiate outcomes above 22°C if skies clear.