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 4, 4:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Las Vegas on July 3, 2026, using official National Weather Service data. The outcome will be determined by the daily maximum temperature reported by the NWS Climatological Report for the Las Vegas area.
Resolution is based on the maximum temperature recorded at Las Vegas on July 3, 2026, as reported in the National Weather Service's Climatological Report (Daily) for the Las Vegas, NV location. The official data source is accessed via the NWS Western Region Headquarters climate portal. Temperature ranges are divided into six bands: 98°F or below, 99-100°F, 101-102°F, 103-104°F, 105-106°F, and 107°F or above. Each temperature band corresponds to a distinct market outcome. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official report should be used for resolution rather than real-time or third-party weather services.
Prediction market odds reflect real-money trader conviction and often incorporate meteorological expertise, climate data, and historical temperature records that professional forecasters also rely on. Unlike static analyst reports, this market continuously updates as new information arrives, allowing traders to reprice their bets dynamically. Meteorologists typically issue seasonal outlooks months in advance, while market participants can adjust positions based on evolving atmospheric conditions. Both sources aim to predict extreme heat, but markets reward accuracy with financial incentives, creating strong pressure for participants to synthesize the best available science.
On Kalshi, this market is priced through a continuous order-book mechanism where traders buy and sell shares representing different temperature outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Prices range from 0 to 100 cents per share, with higher prices indicating greater market confidence in hotter conditions. Liquidity and trading volume determine how easily participants can enter or exit positions. The platform's matching engine ensures transparent price discovery, allowing traders to observe the full bid-ask spread and execute orders at competitive rates throughout the market's lifetime.
This market resolves around Jul 4, 2026, once the highest temperature recorded in Las Vegas on July 3, 2026 is finalized and verifiable from credible public sources. The outcome is determined by official meteorological data, typically reported by the National Weather Service or equivalent authoritative weather agencies. Resolution occurs after the trading window closes and the actual temperature is confirmed. Traders should monitor weather stations and official reports as the event date approaches to assess how market prices align with emerging conditions.
Major climate patterns such as heat domes, La Niña or El Niño cycles, and seasonal monsoon activity in the Southwest can significantly shift market prices. Updated long-range weather forecasts from the National Weather Service or international meteorological agencies often trigger repricing as traders adjust expectations. Historical heat records and anomalies in spring temperatures leading up to July provide early signals. Real-time atmospheric data, upper-level ridge positioning, and soil moisture conditions in the region all influence trader positioning. Media coverage of extreme weather events elsewhere can also shift risk sentiment and market dynamics.