Finalized observational data from the Adolfo Suárez Madrid-Barajas Airport meteorological station, as reported by Weather Underground, confirm the highest temperature on April 30, 2026, reached 22°C, driving Polymarket traders to a 100% implied probability on this outcome with real capital at stake. This reflects mild spring conditions across central Spain, consistent with AEMET summaries showing nearby stations like Ciudad Universitaria peaking at 21°C and Retiro at 19.9°C amid partly cloudy skies and moderate winds, below seasonal averages influenced by neutral ENSO patterns. Scenarios challenging this include rare post-processing revisions for sensor anomalies or quality control discrepancies, though such adjustments are infrequent for finalized daily records.
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 April 30?
Highest temperature in Madrid on April 30?
22°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$176,796 Vol.
$176,796 Vol.
17°C or below
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C
No
27°C or higher
No
22°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$176,796 Vol.
$176,796 Vol.
17°C or below
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C
No
27°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 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: Apr 28, 2026, 2:38 PM ET
Resolution Source
https://www.wunderground.com/history/daily/es/madrid/LEMDResolver
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 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/LEMDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Finalized observational data from the Adolfo Suárez Madrid-Barajas Airport meteorological station, as reported by Weather Underground, confirm the highest temperature on April 30, 2026, reached 22°C, driving Polymarket traders to a 100% implied probability on this outcome with real capital at stake. This reflects mild spring conditions across central Spain, consistent with AEMET summaries showing nearby stations like Ciudad Universitaria peaking at 21°C and Retiro at 19.9°C amid partly cloudy skies and moderate winds, below seasonal averages influenced by neutral ENSO patterns. Scenarios challenging this include rare post-processing revisions for sensor anomalies or quality control discrepancies, though such adjustments are infrequent for finalized daily records.
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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