This market tracks the daily high temperature in Seattle for April 20, 2026, allowing traders to forecast hyper-local weather conditions with precision. April is a transitional month in the Pacific Northwest, with average highs typically ranging from 56-60°F, making a high between 50-51°F relatively uncommon and representing cooler-than-normal conditions for this time of year. The market resolves based on the National Weather Service official maximum temperature recorded at Seattle-Tacoma International Airport, which serves as the authoritative data source for all Seattle weather measurements and forecasts. At 0% YES odds, the prediction market currently assigns negligible probability to the temperature falling within this narrow 50-51°F range. This pricing suggests traders collectively expect the actual high to either exceed 51°F or remain below 50°F on that date. The current market confidence reflects broader seasonal expectations for mid-April in the Seattle metropolitan area. Weather prediction markets enable traders to profit from precise forecasts of local atmospheric conditions, with resolution tied to verifiable government meteorological data that removes all ambiguity from the final outcome determination.