Latest ensemble forecasts from ECMWF and GFS models project Shanghai's March 23 high temperature clustering around 15-16°C, driving trader sentiment with those outcomes leading at 35.5% and 31.0% implied probabilities amid tight competition. This reflects a mild spring air mass over eastern China, tempered by lingering northeasterly winds and partial cloud cover from a weakening frontal boundary, per China Meteorological Administration updates. Differentiating factors include urban heat island effects boosting temps by 1-2°C above rural stations and diurnal timing—peak heating midday under variable insolation—against seasonal norms of 13-15°C. Model spreads of ±1.5°C underscore uncertainty, with 17°C viable if sunnier conditions prevail, while 14°C gains from any marine layer persistence. Traders eye final 00Z runs for resolution shifts.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Shanghai on March 23?
Highest temperature in Shanghai on March 23?
16°C 36%
15°C 32%
14°C 16%
17°C 12%
$23,491 Vol.
$23,491 Vol.
11°C or below
<1%
12°C
<1%
13°C
2%
14°C
16%
15°C
32%
16°C
36%
17°C
12%
18°C
4%
19°C
2%
20°C
<1%
21°C or higher
1%
16°C 36%
15°C 32%
14°C 16%
17°C 12%
$23,491 Vol.
$23,491 Vol.
11°C or below
<1%
12°C
<1%
13°C
2%
14°C
16%
15°C
32%
16°C
36%
17°C
12%
18°C
4%
19°C
2%
20°C
<1%
21°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 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: Mar 19, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDResolver
0x69c47De9D...Latest ensemble forecasts from ECMWF and GFS models project Shanghai's March 23 high temperature clustering around 15-16°C, driving trader sentiment with those outcomes leading at 35.5% and 31.0% implied probabilities amid tight competition. This reflects a mild spring air mass over eastern China, tempered by lingering northeasterly winds and partial cloud cover from a weakening frontal boundary, per China Meteorological Administration updates. Differentiating factors include urban heat island effects boosting temps by 1-2°C above rural stations and diurnal timing—peak heating midday under variable insolation—against seasonal norms of 13-15°C. Model spreads of ±1.5°C underscore uncertainty, with 17°C viable if sunnier conditions prevail, while 14°C gains from any marine layer persistence. Traders eye final 00Z runs for resolution shifts.
Experimental AI-generated summary referencing Polymarket data · Updated
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