**Recent forecasts position 31–33°C as the most likely range for Guangzhou’s October 9 daily maximum, consistent with the market’s heaviest trading on 32°C (41.5%), 31°C (26%), and 33°C (23.5%).** Following a weak cold-air intrusion earlier in the month that dropped highs to 27–29°C, high pressure has built in with northeasterly flow, clearing skies and allowing gradual warming. Official and ensemble guidance from sources such as the Guangdong Meteorological Observatory and global models show October 9 highs of 30–31°C under mostly clear to partly cloudy conditions, with negligible rain risk and light winds. This aligns with the long-term October 9 average high of 30°C while remaining well below the 33.1°C record. Traders appear to be weighting the warming trend and stable synoptic pattern more heavily than residual model spread or slight urban-heat-island variability, producing the current implied-probability distribution. New 48–72-hour forecast updates from the China Meteorological Administration and any revisions to boundary-layer moisture or wind forecasts will be the next likely catalysts for shifts in these odds.