Stable high-pressure ridging over the Iberian Peninsula is anchoring mild conditions for Madrid on May 17, with the latest ECMWF and GFS ensemble runs converging on a daily maximum near 22–23 °C. Persistent northerly flow and limited insolation from residual cloud cover are suppressing daytime heating, consistent with the 21 °C peak recorded at Adolfo Suárez Madrid–Barajas Airport on May 14. These factors keep the market-implied probabilities highest for 22 °C (39 %) and 23 °C (25.5 %), while climatological mid-May averages of 23–24 °C remain just out of reach unless ridge breakdown occurs overnight. Official AEMET observations tomorrow will resolve 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 Madrid on May 17?
22°C 40%
23°C 25%
21°C 20%
24°C 11%
17°C or below
<1%
18°C
<1%
19°C
1%
20°C
6%
21°C
20%
22°C
40%
23°C
25%
24°C
11%
25°C
1%
26°C
<1%
27°C or higher
<1%
22°C 40%
23°C 25%
21°C 20%
24°C 11%
17°C or below
<1%
18°C
<1%
19°C
1%
20°C
6%
21°C
20%
22°C
40%
23°C
25%
24°C
11%
25°C
1%
26°C
<1%
27°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 Adolfo Suárez Madrid-Barajas Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/es/madrid/LEMD.
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 15, 2026, 12:04 AM ET
Resolution Source
https://www.wunderground.com/history/daily/es/madrid/LEMDThe 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 Adolfo Suárez Madrid-Barajas Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/es/madrid/LEMD.
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/es/madrid/LEMDStable high-pressure ridging over the Iberian Peninsula is anchoring mild conditions for Madrid on May 17, with the latest ECMWF and GFS ensemble runs converging on a daily maximum near 22–23 °C. Persistent northerly flow and limited insolation from residual cloud cover are suppressing daytime heating, consistent with the 21 °C peak recorded at Adolfo Suárez Madrid–Barajas Airport on May 14. These factors keep the market-implied probabilities highest for 22 °C (39 %) and 23 °C (25.5 %), while climatological mid-May averages of 23–24 °C remain just out of reach unless ridge breakdown occurs overnight. Official AEMET observations tomorrow will resolve 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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