Official measurements from the China Meteorological Administration at Guangzhou Baiyun International Airport confirm the highest temperature reached exactly 30°C on April 27, 2026, driving Polymarket's 100% implied probability for that outcome as traders incorporate real-time observational data via Weather Underground records showing a peak of 86°F. A strengthening subtropical ridge post-thunderstorms cleared skies for peak solar insolation midday, with urban heat island effects adding about 1°C amid high humidity limiting further rises, aligning with GFS, ECMWF, and CMA model consensus spanning 29–31°C. Historical late-April averages near 28°C provide context, while resolution hinges on whole-degree airport readings; rare post-report revisions from equipment calibration could challenge, though unlikely given consistent hourly logs.
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 April 27?
Highest temperature in Guangzhou on April 27?
30°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$50,718 Vol.
$50,718 Vol.
Apr 27, 2026
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
No
29°C
No
30°C
Yes
31°C
No
32°C
No
33°C
No
34°C or higher
No
30°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$50,718 Vol.
$50,718 Vol.
Apr 27, 2026
24°C or below
$3,636 Vol.
No
25°C
$817 Vol.
No
26°C
$3,745 Vol.
No
27°C
$4,059 Vol.
No
28°C
$3,414 Vol.
No
29°C
$6,019 Vol.
No
30°C
$8,082 Vol.
Yes
31°C
$7,779 Vol.
No
32°C
$4,541 Vol.
No
33°C
$4,748 Vol.
No
34°C or higher
$3,878 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Guangzhou Baiyun International Airport Station in degrees Celsius on 27 Apr '26.
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.Official measurements from the China Meteorological Administration at Guangzhou Baiyun International Airport confirm the highest temperature reached exactly 30°C on April 27, 2026, driving Polymarket's 100% implied probability for that outcome as traders incorporate real-time observational data via Weather Underground records showing a peak of 86°F. A strengthening subtropical ridge post-thunderstorms cleared skies for peak solar insolation midday, with urban heat island effects adding about 1°C amid high humidity limiting further rises, aligning with GFS, ECMWF, and CMA model consensus spanning 29–31°C. Historical late-April averages near 28°C provide context, while resolution hinges on whole-degree airport readings; rare post-report revisions from equipment calibration could challenge, though unlikely given consistent hourly logs.
This market will resolve to the temperature range that contains the highest temperature recorded at the Guangzhou Baiyun International Airport Station in degrees Celsius on 27 Apr '26.
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.
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: Apr 25, 2026, 12:53 AM ET
Volume
$50,718End Date
Apr 27, 2026Market Opened
Apr 25, 2026, 12:53 AM ETResolution Source
https://www.wunderground.com/history/daily/cn/guangzhou/ZGGGResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Guangzhou Baiyun International Airport Station in degrees Celsius on 27 Apr '26.
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.Official measurements from the China Meteorological Administration at Guangzhou Baiyun International Airport confirm the highest temperature reached exactly 30°C on April 27, 2026, driving Polymarket's 100% implied probability for that outcome as traders incorporate real-time observational data via Weather Underground records showing a peak of 86°F. A strengthening subtropical ridge post-thunderstorms cleared skies for peak solar insolation midday, with urban heat island effects adding about 1°C amid high humidity limiting further rises, aligning with GFS, ECMWF, and CMA model consensus spanning 29–31°C. Historical late-April averages near 28°C provide context, while resolution hinges on whole-degree airport readings; rare post-report revisions from equipment calibration could challenge, though unlikely given consistent hourly logs.
This market will resolve to the temperature range that contains the highest temperature recorded at the Guangzhou Baiyun International Airport Station in degrees Celsius on 27 Apr '26.
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.
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.
Volume
$50,718End Date
Apr 27, 2026Market Opened
Apr 25, 2026, 12:53 AM ETResolution Source
https://www.wunderground.com/history/daily/cn/guangzhou/ZGGGResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official measurements from the China Meteorological Administration at Guangzhou Baiyun International Airport confirm the highest temperature reached exactly 30°C on April 27, 2026, driving Polymarket's 100% implied probability for that outcome as traders incorporate real-time observational data via Weather Underground records showing a peak of 86°F. A strengthening subtropical ridge post-thunderstorms cleared skies for peak solar insolation midday, with urban heat island effects adding about 1°C amid high humidity limiting further rises, aligning with GFS, ECMWF, and CMA model consensus spanning 29–31°C. Historical late-April averages near 28°C provide context, while resolution hinges on whole-degree airport readings; rare post-report revisions from equipment calibration could challenge, though unlikely given consistent hourly logs.
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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