Persistent high-pressure systems and above-average baseline temperatures across central Spain—following the hottest first half of 2026 on record and a late-June heatwave that pushed Madrid to 40°C—have driven market-implied odds toward 39–40°C for July 6. Official forecasts from AEMET, Met Office, and BBC currently converge on daytime maxima of 38–39°C under mostly clear skies and light northeasterly winds, with limited model spread on peak values. The narrow edge for 40°C reflects trader expectations that urban heat-island amplification or minor forecast upgrades in the final 48 hours could nudge readings one degree higher, while lower outcomes remain possible if subsidence weakens or boundary-layer mixing increases. Resolution hinges on the official daily maximum recorded at Madrid’s reference station.
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 July 6?
39°C 37%
40°C 37%
38°C 7%
42°C 7%
35°C or below
1%
36°C
1%
37°C
5%
38°C
7%
39°C
37%
40°C
37%
41°C
6%
42°C
7%
43°C
1%
44°C
<1%
45°C or higher
<1%
39°C 37%
40°C 37%
38°C 7%
42°C 7%
35°C or below
1%
36°C
1%
37°C
5%
38°C
7%
39°C
37%
40°C
37%
41°C
6%
42°C
7%
43°C
1%
44°C
<1%
45°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 for the Adolfo Suárez Madrid-Barajas Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Jul 4, 2026, 1:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/es/madrid/LEMDResolver
0x69c47De9D...The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Adolfo Suárez Madrid-Barajas Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolution Source
https://www.wunderground.com/history/daily/es/madrid/LEMDResolver
0x69c47De9D...Persistent high-pressure systems and above-average baseline temperatures across central Spain—following the hottest first half of 2026 on record and a late-June heatwave that pushed Madrid to 40°C—have driven market-implied odds toward 39–40°C for July 6. Official forecasts from AEMET, Met Office, and BBC currently converge on daytime maxima of 38–39°C under mostly clear skies and light northeasterly winds, with limited model spread on peak values. The narrow edge for 40°C reflects trader expectations that urban heat-island amplification or minor forecast upgrades in the final 48 hours could nudge readings one degree higher, while lower outcomes remain possible if subsidence weakens or boundary-layer mixing increases. Resolution hinges on the official daily maximum recorded at Madrid’s reference station.
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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