Highest temperature in London on July 10?

Prediction market odds reflect aggregated trader beliefs and often incorporate meteorological forecasts, historical data, and seasonal patterns. Professional weather analysts publish point estimates and confidence intervals; this market distills those into probabilistic outcomes that traders can bet on. When analyst consensus shifts—say, a new model run suggests cooler air—odds typically adjust within hours. Comparing the implied probability from this market to published forecasts helps you spot where crowd sentiment diverges from expert opinion, revealing potential trading edges.

On Polymarket, traders set the odds by buying and selling shares of competing outcomes through an automated market maker. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome—such as whether the high will be 27°C—has a price between 0 and 100 cents, representing the implied probability. As traders accumulate positions, the price adjusts to balance supply and demand. Higher trading volume typically narrows spreads and improves price discovery, making the odds more reflective of true consensus.

This market resolves around Jul 10, 2026, once the highest temperature recorded in London on July 10 is verifiable from credible public sources. The outcome is determined by comparing the official reading to the threshold specified in each contract. Traders holding shares in the correct outcome receive their payout; incorrect positions expire worthless. Resolution typically occurs within 24–48 hours of the event, once meteorological data is finalized and confirmed.

Major weather model updates—particularly from the UK Met Office or European Centre for Medium-Range Weather Forecasts—often trigger sharp price swings as traders reassess the probability of heat. Atmospheric patterns, jet stream positioning, and high-pressure systems over the Atlantic can shift forecasts materially. Real-time temperature readings in the days leading up to July 10 will anchor expectations; an unusually warm or cool trend will push odds accordingly. Breaking news about climate anomalies or sudden weather pattern changes can also drive volatility in this market.