Highest temperature in Philadelphia on May 28, 2026?

Prediction market odds on Kalshi reflect real-money trader conviction and often incorporate meteorological models, historical May temperature patterns, and seasonal climate data. Traditional weather analysts and the National Weather Service issue deterministic forecasts based on atmospheric modeling. Market odds tend to be more dynamic and probabilistic, updating continuously as new weather data emerges. Comparing the market's implied temperature distribution to official forecasts can reveal whether traders are pricing in higher uncertainty, seasonal anomalies, or specific weather systems expected to influence Philadelphia's conditions on that date.

On Kalshi, the highest temperature in Philadelphia on May 28 is priced as a binary contract with outcomes tied to specific temperature thresholds. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The platform currently shows strong conviction that the high will remain at or above 76 degrees, reflected in the top outcome probability. Traders buy and sell shares representing each outcome, with prices ranging from 0 to 100 cents. The current market price directly reflects the collective probability estimate. As May 28 approaches and weather models update, prices adjust to incorporate new meteorological data and trader positioning.

The market resolves on May 29, 2026. Resolution is determined by the official recorded high temperature in Philadelphia on May 28, 2026, as reported by the relevant meteorological authority. The outcome depends on whether the actual high temperature meets or exceeds the threshold specified in the contract terms. Once the day concludes and the official temperature reading is confirmed, the market settles automatically and traders receive payouts based on which outcome occurred and their position size.

Several factors can shift market odds before May 28, 2026. Updated weather models from the National Weather Service or European forecasting centers may indicate stronger or weaker high-pressure systems. Seasonal climate patterns, such as El Niño or La Niña conditions, influence late-May temperatures across the Northeast. Historical anomalies and long-range forecasts become more precise as the date approaches. Traders also react to broader atmospheric trends, jet stream positioning, and any unusual weather events in the weeks leading up to May 28. Real-time model consensus typically tightens probability estimates in the final days before resolution.