Highest temperature in Seattle on June 5?

The market resolves on Jun 5, 2026, after the highest temperature observation for Seattle on June 5 is recorded. Resolution hinges on official temperature data from a designated weather station or meteorological authority. The specific measurement methodology, time window, and data source are defined in the market's terms. Once the final temperature is confirmed, the outcome is determined by comparing it against the threshold embedded in each contract. Markets typically resolve within hours of the event close, though verification delays can extend settlement slightly.

Major weather pattern shifts, including changes to high-pressure systems, jet stream positioning, and marine air intrusion, can significantly alter Seattle's June 5 temperature outlook. Updated National Weather Service forecasts and ensemble model runs often trigger trader repositioning. Anomalous spring or early-summer heat waves affecting the Pacific Northwest would push odds toward higher temperatures. Conversely, persistent cloud cover or cool ocean currents favor lower readings. Historical analogs to past June 5 conditions and broader climate indices like the Pacific Decadal Oscillation may influence longer-term positioning. Real-time atmospheric data releases and satellite imagery can spark intraday volatility as traders refine their edge.