Forecast models from agencies including the China Meteorological Administration and international sources such as the Met Office converge on a daily maximum of 24°C in Shanghai on September 30, 2026, under persistent northeasterly flow, overcast skies, and light drizzle that limits daytime heating. This outcome aligns with late-September climatology, when average highs near 26–27°C give way to cooler maritime air, and recent observations show temperatures stabilizing in the low-to-mid 20s amid 70–80% cloud cover and minimal solar insolation. Trader consensus at 100% implied probability reflects the narrow uncertainty range in short-range guidance, with resolution hinging on official station readings that rarely deviate by more than 1°C from ensemble means. Only an unexpected clearing trend or model error exceeding typical verification skill could shift the recorded high outside this bin.
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