There is a possibility that someone has made over 5.4 million yen by heating up weather station sensors for online gambling.
A weather station at
INFO BFMTV. Polymarket: des parieurs ont-ils manipulé un capteur de Météo France pour s'enrichir?
https://www.bfmtv.com/police-justice/info-bfmtv-polymarket-des-parieurs-ont-ils-manipule-un-capteur-de-meteo-france-pour-s-enrichir_AN-202604200715.html
A Hair Dryer May Have Gamed a Paris Weather Sensor for $34,000 on Polymarket – Bitcoin News
https://news.bitcoin.com/a-hair-dryer-may-have-gamed-a-paris-weather-sensor-for-34000-on-polymarket/
At approximately 6:30 PM local time on April 6, 2026, the temperature reading at the weather station at Charles de Gaulle International Airport rose sharply by about 4°C in just 12 minutes, briefly reaching 22.5°C before returning to normal. A similar phenomenon occurred around 9:30 PM on April 15, where the temperature temporarily rose to 22°C before returning to normal within a few minutes.
In all cases, no abnormal weather patterns were observed locally, no similar changes were seen at nearby weather stations, and temperature-related parameters such as wind direction and relative humidity did not show the expected changes.
Meteorologist Paul Marquis points out that this pattern is difficult to explain with natural phenomena. He argues that the most plausible explanation is that someone intentionally raised the temperature by installing a heating device near the sensors at Charles de Gaulle International Airport, a location accessible from a public road.
Around the same time that unusually high temperatures were observed at Charles de Gaulle International Airport, strange transactions were taking place on the online gambling site
Polymarket also offers betting opportunities related to weather phenomena, including one such bet: ' Highest temperature in Paris on April 6?' While most users predicted a temperature between 14°C and 16°C, one user who bet on the long shot of 21°C won a staggering $14,000 (approximately 2.23 million yen). This user had only opened their account a few days prior.
Furthermore, a similar bet was made on April 15th, and the user who predicted the temperature would reach a long shot of 22°C won a large sum of approximately $20,000 (about 3.19 million yen). If the user who bet on the long shot in these bets was the same person, they would have quickly earned a total of $34,000. Since the data from the weather station at Charles de Gaulle International Airport was used for the bet, it has been suggested that someone may have heated the weather station in order to win the large bet.
Meteorologist Reuben Harari told French media, 'It seems highly unlikely that such temperature fluctuations would occur in such a short period of time on these two dates. I suspect that someone familiar with how sensors work intervened to win the bet and raised the temperature by 2 degrees at just the right moment.'
The French meteorological service has already filed a complaint with the air transport gendarmerie at Charles de Gaulle International Airport, alleging that the airport's automated data processing system was tampered with. Polymarket also reportedly changed the data source used for these bets from the weather station at Charles de Gaulle International Airport to the weather station at Le Bourget Airport on April 19.
The incident has also become a hot topic on X, with one user posting, 'Oh my god. A hair dryer at Paris Airport disrupted Polymarket's weather betting market, giving someone a $34,000 profit,' claiming that someone must have manipulated the temperature with a portable heater like a hair dryer.
holy fuck, a hair dryer at a Paris airport broke Polymarket weather markets & made someone $34,000 richer
— @aaronjmars (@aaronjmars) April 22, 2026
- polymarket was settling Paris temperature bets on a single Météo France sensor sitting near the Charles de Gaulle runway perimeter - basically unguarded
- the guy bought… pic.twitter.com/ona2hP3oZc
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in Note, Posted by log1h_ik