French police probe alleged tampering with weather sensor to win bets

Up to €430,000 was bet on the weather forecast on some days

Thu, 23 Apr, 2026 - 19:00

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French police are investigating alleged tampering with national weather forecasting service equipment after a series of unusual temperature readings coincided with suspicious winning bets made on Polymarket.

Data from a Météo-France weather station at Paris’s Charles de Gaulle airport was used to settle bets between online gamblers on what the temperature would be in Paris for March and the first weeks of April.