Daily Temperature Lows Expected Across Five Cities

The Miami contract uses observations from Miami International Airport station KMIA, while its accompanying research page provides additional climate and decision-support information specific to Miami.
The Atlanta market is based on Hartsfield-Jackson Atlanta International Airport station KATL, rather than a general citywide temperature reading.
The Charlotte contract specifies Charlotte Douglas International Airport station KCLT as its official reporting location.
The Nashville market draws its result from Nashville International Airport station KBNA, with a separate Nashville-focused climate research page provided for market analysis.
The Denver contract uses Buckley Space Force Base station KBKF, not Denver International Airport or another central Denver station; the listing also directs users to a Denver-specific analysis page.
Five prediction markets are now live, each betting on the lowest temperature recorded on September 21, 2026, at major U.S. airport weather stations. Weather Underground hosts contracts for Miami, Atlanta, Charlotte, Nashville, and Denver, paying $1 per correct position. Each market specifies an exact airport station and instructs traders to use official summary tables rather than the site's redesigned temperature displays.
Miami's contract pulls data from Miami International Airport station KMIA. Atlanta uses Hartsfield-Jackson Atlanta International Airport station KATL. Charlotte draws from Charlotte Douglas International Airport station KCLT. Nashville references Nashville International Airport station KBNA. Denver uniquely uses Buckley Space Force Base station KBKF—not Denver International Airport. Each contract relies on Weather Underground's Daily Observations data for final settlement.
Each contract lets traders bet on exact temperature outcomes. Positions pay $1 for correct predictions and can be closed before the September 21 observation date. Weather Underground warns that substantial financial risk applies. Applicable fees and restrictions govern all trades. The markets require traders to reference official summary tables on the site to avoid confusion with redesigned temperature displays that may show different readings.
Miami and Nashville each include dedicated climate and decision-support research pages. Denver offers a separate analysis page for market participants. These resources provide historical temperature data and local weather patterns specific to each city. Traders can use this information to build forecasts before betting. The pages help users understand typical September weather at each airport location.
Weather Underground selected airport stations because they maintain consistent, official observations. These locations report hourly data to aviation authorities. Airport weather stations follow strict measurement standards. Using specific airports prevents disputes over which "city" temperature counts. The contracts make clear that general citywide readings do not apply—only the designated airport station's data determines payouts.
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