This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Guangzhou Baiyun International Airport Station in degrees Celsius on 3 Sep '26. The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=zggg If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source. In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket. To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C. This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first. The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Recent precipitation and extensive cloud cover associated with a regional weather system are suppressing daytime heating in Guangzhou, keeping the September 3 maximum temperature forecast well below the long-term average high of ~33 °C. Multiple model runs and official outlooks converge on highs of 26–30 °C under mostly cloudy to overcast skies with scattered thunderstorms or showers, which reduce incoming solar radiation and enhance evaporative cooling. Northwesterly winds and high humidity further limit warming. The tight clustering of market-implied odds around 29–31 °C reflects minor differences among forecasts in the exact timing, coverage, and intensity of rain versus any brief clearing periods that could allow slightly higher peaks. Historical analogs show that similar early-September rain events in the Pearl River Delta typically cap daily maxima 3–5 °C below climatology.