Recent forecast models and observational data from Chinese meteorological services indicate a daily maximum of 27°C in Chengdu on September 9, driven by lingering warm air ahead of an incoming cold front and associated rainfall. Persistent cloud cover and precipitation have limited daytime heating, aligning with the narrow range around this value rather than seasonal September averages near 26–28°C. Trader consensus at 100% on 27°C reflects high confidence in official station readings meeting this exact threshold. Uncertainties remain around precise peak timing or localized variations, but only substantial revisions in post-event verification or unexpected clear-sky development would shift the outcome.