TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 10, 4:00 AM EST
Kalshi
This event tracks the highest temperature recorded in Seattle on July 9, 2026. The outcome will be determined by the official National Weather Service Climatological Report for that date, which provides the daily maximum temperature reading for the Seattle-Tacoma area.
Resolution is based on the maximum temperature recorded at Seattle-Tacoma, WA on July 9, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed through the NWS website at the specified URL, selecting Seattle-Tacoma, WA with Daily Climate Report. Temperature readings are divided into six ranges: 72°F or below, 73-74°F, 75-76°F, 77-78°F, 79-80°F, and 81°F or above. Each range corresponds to a distinct outcome. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official NWS Climatological Report (Daily) serves as the authoritative source, superseding other weather services.
Prediction market odds often diverge from traditional meteorological forecasts because they incorporate real-time trader behavior and risk sentiment alongside historical weather models. While meteorologists rely on atmospheric data and computer simulations to project July temperatures, this market reflects what participants are willing to stake on specific outcomes. Over time, prediction markets have proven competitive with expert forecasts for near-term weather events, though analyst models may capture longer-term climate patterns that markets struggle to price efficiently.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell contracts tied to 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—for example, whether the high will exceed 85°F or stay below 80°F—and the price reflects the probability traders assign to that outcome. As new information emerges or trading volume shifts, prices adjust in real time, allowing participants to enter or exit positions at market rates.
This market resolves around Jul 10, 2026, after July 9, 2026 concludes and the day's highest temperature is recorded. The outcome is confirmed once the verified temperature reading becomes available from credible public sources. Traders' positions settle based on whether the actual peak temperature falls within the range they wagered on, converting their contracts to final payouts or losses.
Major weather pattern shifts, seasonal climate anomalies, and updated long-range forecasts from meteorological agencies can significantly influence trading activity. Heat waves, atmospheric blocking patterns, or unexpected cold fronts in the weeks leading up to July 9 would prompt traders to reassess probabilities. Additionally, historical temperature records for Seattle in early July and any unusual climate events in 2026 may trigger volatility as participants adjust their expectations for that specific day's conditions.