One user profited $34,000 by interfering with Polymarket's temperature forecasting market by heating weather sensors.

According to Odaily, a user profited $34,000 in the Polymarket weather forecast market by interfering with weather sensors at Paris airport. Polymarket previously used data from the Météo France sensor near Paris Charles de Gaulle Airport for settlement. The user purchased temperature options at extremely low prices, far exceeding market expectations. The user then used a portable heat source to heat the sensor, causing the readings to spike dramatically in a short period and be recorded as the day's highest temperature. This behavior occurred twice, on April 6th and April 15th. Météo France has detected the anomaly and filed charges.