French Agency Reports Tampering with Paris Airport Temperature Sensor for Polymarket Bets
French authorities have launched an investigation into suspected tampering with a weather sensor at Paris-Charles de Gaulle Airport after unusual temperature spikes aligned with winning bets on the U.S. platform Polymarket. The national meteorological agency Meteo France reported the incidents on April 6 and April 15, where sensors recorded sudden rises to 22 degrees Celsius.
onemileatatime.comU.S. betting platform Polymarket. Meteo France, the national meteorological agency, filed a formal complaint regarding the tampering of an automated data processing system used to measure daily temperatures for Paris.
The complaint was sent in a statement to CNN on Thursday. On April 15, the temperature recorded by the Charles de Gaulle sensor reached 22 degrees Celsius, four degrees higher than the day before. A user on Polymarket won $20,000 for successfully betting on the 22-degree reading that day.
Infoclimat, a French climate nonprofit association, flagged the spike to Meteo France. m. m. 6 Fahrenheit) before dropping back to cooler spring temperatures.
M. m. 4 Fahrenheit) all afternoon. The unusual spike was flagged by members of Infoclimat.
A Polymarket user won $14,000 for placing a successful bet on 22 degrees Celsius on April 6. Users of the American betting platform placed successful bets on these unexpected temperature spikes in Paris on two separate occasions in April, according to CNN affiliate BFMTV.
Data from a Meteo France weather station at Paris’s Charles de Gaulle Airport was used to settle bets on Polymarket for the highest temperature in Paris in March and the first weeks of April, as reported by The Guardian.
Meteo France filed the complaint to airport police at Charles de Gaulle, and an investigation into the tampering is now underway. Airport police at Charles de Gaulle declined CNN’s request for comment. A weather sensor at Paris-Charles de Gaulle Airport has been tampered with, according to the French weather association.
Polymarket was launched in 2020. The platform allows users to place bets on future events such as the highest temperature in a city on a given day. This incident marks another controversy for Polymarket.
An exclusive CNN investigation published at the end of March found evidence that one trader made nearly a million dollars from successful bets on Polymarket over a two-year period by accurately predicting American and Israeli military actions against Iran.


