Lowest temperature in Seattle on Jul 4, 2026?

Prediction market odds often diverge from traditional weather forecasts because they incorporate real-time trader behavior, risk appetite, and information asymmetries. While meteorologists publish deterministic or probabilistic forecasts based on atmospheric models, this market aggregates the beliefs of many participants with financial stakes in the outcome. Traders may weight recent data, seasonal patterns, or climate anomalies differently than official forecasters do. Comparing the implied probabilities here to published forecasts from the National Weather Service or other meteorological agencies can reveal where market participants see value or disagreement, making it a complementary lens on what to expect for Seattle's low temperature that day.

On Kalshi, this market is priced through an order-book mechanism where traders buy and sell contracts corresponding to different temperature ranges. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each contract represents a specific outcome band, and the price reflects the probability traders assign to that range occurring. As new information arrives—updated weather models, seasonal data, or real-time conditions—traders adjust their bids and offers, moving prices up or down. The spread between buy and sell prices narrows or widens based on liquidity and conviction, so tighter spreads often signal higher confidence in a particular outcome range.

This market resolves around Jul 5, 2026, once July 4th, 2026 has passed and the day's weather data is finalized. The outcome is determined by the lowest temperature officially recorded in Seattle on that date, verified against credible public sources. Traders' positions settle based on which outcome range the actual low temperature falls into. Until that point, this market remains open to trading, allowing participants to adjust their exposure as the event date approaches and new forecasts become available.

Several factors could shift odds in this market before resolution. Updated seasonal climate forecasts, El Niño or La Niña patterns, and long-range atmospheric models will influence trader positioning. Major weather events or anomalies in the months leading up to July 2026 may alter expectations for summer temperatures in the Pacific Northwest. Real-time conditions in late June—such as heat waves or unusual cold systems—typically drive sharp repricing as the event date nears. Additionally, any revisions to historical temperature records or changes in how Seattle's official low is measured could affect final settlement, though such changes are rare.