Official meteorological observations from Shanghai Pudong International Airport, the market's resolving station under China Meteorological Administration protocols, recorded a peak temperature of 28°C on May 12, driving trader consensus to a 100% implied probability for that outcome as preliminary data solidified overnight. This aligns with partly cloudy conditions, light southerly winds, and moderate humidity (around 70%) that capped daytime heating after morning lows near 19°C, consistent with Shanghai's early May climatology where average highs range 24–26°C amid transitioning spring patterns. Model forecasts from NOAA and local agencies had converged on 27–29°C ranges pre-event. Realistic challenges would require a rare post hoc data revision from quality-controlled multi-station analysis, but with final reports pending confirmation today, the positioning reflects high-confidence observational evidence.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Shanghai on May 12?
28°C 100.0%
25°C or below <1%
26°C <1%
27°C <1%
$275,944 Vol.
$275,944 Vol.
25°C or below
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C
No
32°C
No
33°C
No
34°C
No
35°C or higher
No
28°C 100.0%
25°C or below <1%
26°C <1%
27°C <1%
$275,944 Vol.
$275,944 Vol.
25°C or below
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C
No
32°C
No
33°C
No
34°C
No
35°C or higher
No
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 Shanghai Pudong International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/cn/shanghai/ZSPD.
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 10, 2026, 12:09 AM ET
Resolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 Shanghai Pudong International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/cn/shanghai/ZSPD.
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/shanghai/ZSPDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official meteorological observations from Shanghai Pudong International Airport, the market's resolving station under China Meteorological Administration protocols, recorded a peak temperature of 28°C on May 12, driving trader consensus to a 100% implied probability for that outcome as preliminary data solidified overnight. This aligns with partly cloudy conditions, light southerly winds, and moderate humidity (around 70%) that capped daytime heating after morning lows near 19°C, consistent with Shanghai's early May climatology where average highs range 24–26°C amid transitioning spring patterns. Model forecasts from NOAA and local agencies had converged on 27–29°C ranges pre-event. Realistic challenges would require a rare post hoc data revision from quality-controlled multi-station analysis, but with final reports pending confirmation today, the positioning reflects high-confidence observational evidence.
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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