Highest temperature in Warsaw on June 30?

Prediction market odds often diverge from traditional weather analyst forecasts because they incorporate real-time trader behavior and incentives. While meteorologists rely on physics-based models and historical data, this market aggregates the beliefs of many participants with financial stakes in accuracy. Traders may react faster to emerging atmospheric patterns or weight recent conditions differently than official forecasts do. Comparing the implied probability from market prices to published forecasts from national weather services can reveal where the crowd sees greater or lesser confidence in specific temperature outcomes.

On Polymarket, traders set prices through an automated market maker that adjusts odds based on buy and sell pressure. 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 exactly 31°C—is represented as a tradable contract with a price between 0 and 100 cents, reflecting the implied probability. As traders purchase shares predicting higher or lower temperatures, the price moves to balance supply and demand. This continuous repricing ensures the market stays responsive to new information and participant conviction.

This market resolves around Jun 30, 2026, once the highest temperature recorded in Warsaw for June 30 is finalized and verifiable from credible public sources. The outcome is determined by comparing the actual peak temperature to the specific threshold outlined in the market contract. Resolution typically occurs within hours or a day after the event concludes, once official meteorological data is published. Traders' positions are then settled based on whether the real-world temperature matched their predicted outcome.

Major weather pattern shifts, updated seasonal forecasts, and atmospheric anomalies can all shift trader expectations and move prices significantly. Unexpected heat waves, changes in jet stream positioning, or revised climate indices may prompt traders to reassess their positions. Real-time weather alerts and official forecasts issued closer to June 30 often trigger sharp repricing as new data reduces uncertainty. Additionally, historical temperature records for Warsaw and broader European weather trends can influence how traders weigh the likelihood of extreme heat on that specific day.