Recent forecast runs from the China Meteorological Administration, ECMWF, and GFS models point to a Guangzhou high near 28–29 °C on May 19, with variable morning cloud cover and scattered showers limiting solar heating in the Pearl River Delta’s humid subtropical environment. This keeps the 29 °C bin narrowly ahead at 26 % implied probability, followed closely by 28 °C, as traders weigh modest afternoon clearing against typical mid-May moisture influx. Historical May daily maxima average 29 °C at Baiyun station, yet interannual swings of 3–4 °C occur regularly depending on convective activity. Updated model consensus and any overnight rain reports in the next 48 hours will sharpen resolution odds before the official observation closes the market.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Guangzhou on May 19?
29°C 26%
28°C 22%
30°C 16%
31°C 12%
25°C or below
2%
26°C
4%
27°C
11%
28°C
22%
29°C
26%
30°C
16%
31°C
12%
32°C
5%
33°C
1%
34°C
<1%
35°C or higher
<1%
29°C 26%
28°C 22%
30°C 16%
31°C 12%
25°C or below
2%
26°C
4%
27°C
11%
28°C
22%
29°C
26%
30°C
16%
31°C
12%
32°C
5%
33°C
1%
34°C
<1%
35°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Guangzhou Baiyun International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/cn/guangzhou/ZGGG.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: May 17, 2026, 12:06 AM ET
Resolution Source
https://www.wunderground.com/history/daily/cn/guangzhou/ZGGGThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Guangzhou Baiyun International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/cn/guangzhou/ZGGG.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Resolution Source
https://www.wunderground.com/history/daily/cn/guangzhou/ZGGGRecent forecast runs from the China Meteorological Administration, ECMWF, and GFS models point to a Guangzhou high near 28–29 °C on May 19, with variable morning cloud cover and scattered showers limiting solar heating in the Pearl River Delta’s humid subtropical environment. This keeps the 29 °C bin narrowly ahead at 26 % implied probability, followed closely by 28 °C, as traders weigh modest afternoon clearing against typical mid-May moisture influx. Historical May daily maxima average 29 °C at Baiyun station, yet interannual swings of 3–4 °C occur regularly depending on convective activity. Updated model consensus and any overnight rain reports in the next 48 hours will sharpen resolution odds before the official observation closes the market.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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