Latest forecast models from the China Meteorological Administration show Shanghai’s May 18 high settling near 26–27 °C under partly cloudy skies and light southerly flow that limits daytime heating. Subtle differences in afternoon cloud thickness and timing of any sea-breeze front could shift the peak by 1–2 °C, keeping the 26 °C, 27 °C, and 28 °C contracts tightly bunched. Historical May climatology places the long-term average daily maximum at roughly 25 °C, so current readings sit slightly above normal but remain well within typical spring variability. Traders will monitor the final 12-hour model runs and surface observations from Pudong and Hongqiao stations for resolution.
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 18?
Highest temperature in Shanghai on May 18?
27°C 37%
26°C 31%
28°C 25%
29°C 6%
NEW
$25,550 Vol.
NEW
$25,550 Vol.
May 18, 2026
21°C or below
<1%
22°C
<1%
23°C
<1%
24°C
1%
25°C
5%
26°C
31%
27°C
37%
28°C
25%
29°C
6%
30°C
1%
31°C or higher
<1%
27°C 37%
26°C 31%
28°C 25%
29°C 6%
NEW
$25,550 Vol.
NEW
$25,550 Vol.
May 18, 2026
21°C or below
$869 Vol.
<1%
22°C
$1,052 Vol.
<1%
23°C
$3,788 Vol.
<1%
24°C
$3,037 Vol.
1%
25°C
$2,839 Vol.
5%
26°C
$2,791 Vol.
31%
27°C
$1,876 Vol.
37%
28°C
$1,609 Vol.
25%
29°C
$2,416 Vol.
6%
30°C
$2,205 Vol.
1%
31°C or higher
$3,069 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Shanghai Pudong International Airport Station in degrees Celsius on 18 May '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 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.Latest forecast models from the China Meteorological Administration show Shanghai’s May 18 high settling near 26–27 °C under partly cloudy skies and light southerly flow that limits daytime heating. Subtle differences in afternoon cloud thickness and timing of any sea-breeze front could shift the peak by 1–2 °C, keeping the 26 °C, 27 °C, and 28 °C contracts tightly bunched. Historical May climatology places the long-term average daily maximum at roughly 25 °C, so current readings sit slightly above normal but remain well within typical spring variability. Traders will monitor the final 12-hour model runs and surface observations from Pudong and Hongqiao stations for resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the Shanghai Pudong International Airport Station in degrees Celsius on 18 May '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 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.
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 16, 2026, 12:04 AM ET
Volume
$25,550End Date
May 18, 2026Market Opened
May 16, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDThis market will resolve to the temperature range that contains the highest temperature recorded at the Shanghai Pudong International Airport Station in degrees Celsius on 18 May '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 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.Latest forecast models from the China Meteorological Administration show Shanghai’s May 18 high settling near 26–27 °C under partly cloudy skies and light southerly flow that limits daytime heating. Subtle differences in afternoon cloud thickness and timing of any sea-breeze front could shift the peak by 1–2 °C, keeping the 26 °C, 27 °C, and 28 °C contracts tightly bunched. Historical May climatology places the long-term average daily maximum at roughly 25 °C, so current readings sit slightly above normal but remain well within typical spring variability. Traders will monitor the final 12-hour model runs and surface observations from Pudong and Hongqiao stations for resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the Shanghai Pudong International Airport Station in degrees Celsius on 18 May '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 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.
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.
Volume
$25,550End Date
May 18, 2026Market Opened
May 16, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/cn/shanghai/ZSPDLatest forecast models from the China Meteorological Administration show Shanghai’s May 18 high settling near 26–27 °C under partly cloudy skies and light southerly flow that limits daytime heating. Subtle differences in afternoon cloud thickness and timing of any sea-breeze front could shift the peak by 1–2 °C, keeping the 26 °C, 27 °C, and 28 °C contracts tightly bunched. Historical May climatology places the long-term average daily maximum at roughly 25 °C, so current readings sit slightly above normal but remain well within typical spring variability. Traders will monitor the final 12-hour model runs and surface observations from Pudong and Hongqiao stations for resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions