Latest numerical weather prediction models show Guangzhou's September 1 maximum temperature likely peaking near 32–33 °C, driven by persistent subtropical high pressure offset by scattered convective showers and increasing northerly wind components. Model spread arises primarily from differing resolutions of afternoon thunderstorm timing and cloud cover, which can suppress peak insolation by 1–2 °C, while drier scenarios allow brief clearing and higher readings. These values align closely with the 1991–2020 climatological average of 32.9 °C for the date. Traders appear to weigh recent ensemble runs from regional centers against historical variability in early-September monsoon transitions, where precipitation probability near 50 % introduces the main uncertainty for exact daily highs. Updated short-range guidance over the next 48 hours will likely narrow the distribution further.