Official Weather Underground records from the William P. Hobby Airport (KHOU) ASOS station confirm Houston's highest temperature on May 9, 2026, reached at least 90°F, marking the season's first 90-degree day amid persistent high pressure and abundant sunshine that suppressed cloud cover and boosted daytime heating beyond the May normal of 84°F. This observational data—surface measurements from calibrated sensors—drives the market's 100% implied probability on 90°F or higher, reflecting trader consensus on the resolution source with real capital at stake. Scenarios challenging this include rare post hoc data corrections for sensor anomalies, though cross-verification with nearby Intercontinental Airport readings near 88–90°F reinforces stability; final NWS climatological summary expected soon will solidify positioning.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Houston on May 9?
90°F or higher 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$85,709 Vol.
$85,709 Vol.
71°F or below
No
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90°F or higher
Yes
90°F or higher 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$85,709 Vol.
$85,709 Vol.
71°F or below
No
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90°F or higher
Yes
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 William P. Hobby Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/tx/houston/KHOU.
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 Fahrenheit (eg, 21°F). 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 7, 2026, 12:07 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/tx/houston/KHOUResolver
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 William P. Hobby Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/tx/houston/KHOU.
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 Fahrenheit (eg, 21°F). 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/us/tx/houston/KHOUResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official Weather Underground records from the William P. Hobby Airport (KHOU) ASOS station confirm Houston's highest temperature on May 9, 2026, reached at least 90°F, marking the season's first 90-degree day amid persistent high pressure and abundant sunshine that suppressed cloud cover and boosted daytime heating beyond the May normal of 84°F. This observational data—surface measurements from calibrated sensors—drives the market's 100% implied probability on 90°F or higher, reflecting trader consensus on the resolution source with real capital at stake. Scenarios challenging this include rare post hoc data corrections for sensor anomalies, though cross-verification with nearby Intercontinental Airport readings near 88–90°F reinforces stability; final NWS climatological summary expected soon will solidify positioning.
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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