Highest temperature in Toronto on May 28?

Prediction market odds on Polymarket reflect real-money trader expectations and often diverge from traditional weather analyst forecasts. While meteorologists rely on numerical weather models and historical data, prediction markets incorporate trader conviction and aggregate dispersed information through price discovery. Comparing Polymarket odds to Environment Canada or other official forecasts can reveal where the crowd expects conditions to differ from model consensus. Market prices update continuously as new weather data emerges, sometimes leading or lagging official updates.

The market resolves on May 28, 2026 after the highest temperature for Toronto on May 28 is officially recorded. Resolution is determined by comparing the actual observed high temperature to the outcome thresholds defined in each contract. Once the official temperature reading is published, the corresponding outcome contract settles to 100 cents and all others to zero. Traders should monitor official weather station data sources to track the final temperature reading as the resolution date approaches.

Major weather pattern shifts, updated seasonal forecasts, and real-time atmospheric data will drive price movements. A sudden cold front or high-pressure system developing over Ontario could significantly alter trader expectations. Updated long-range weather models from meteorological agencies often trigger repricing. Unusual jet stream behavior or tropical system activity affecting North America may also shift odds. As May 28 approaches, daily weather updates and short-range forecasts will become increasingly influential, with prices converging toward the consensus prediction as uncertainty narrows.