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 8, 2:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Chicago on July 7, 2026, using official National Weather Service data from Chicago-Midway. The outcome is determined by which temperature range the daily minimum falls into, ranging from 58°F or below up to 67°F or above.
Resolution is based on the minimum temperature recorded at Chicago-Midway on July 7, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Chicago office website under the Observed Weather tab for Chicago-Midway, IL with Daily Climate Report selected. Temperature ranges are: 58°F or below, 59-60°F, 61-62°F, 63-64°F, 65-66°F, and 67°F or above. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official NWS Climatological Report (Daily) value takes precedence over other weather sources.
Prediction market odds often diverge from traditional meteorological forecasts because they incorporate real-time trader behavior and market incentives alongside historical weather models. While meteorologists rely on atmospheric data and computational models to project conditions weeks in advance, this market reflects participants' willingness to stake capital on their beliefs. Comparing the implied probabilities here to published forecasts from the National Weather Service or private weather firms can reveal where crowd confidence aligns with or diverges from expert consensus, particularly useful for longer-range outlooks where model uncertainty increases.
On Kalshi, this market is priced through a continuous order-book mechanism where traders submit bids and asks for shares tied to specific temperature outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Prices reflect the supply and demand for each outcome bracket, with higher prices indicating stronger market conviction. As new information emerges—seasonal forecasts, climate patterns, or real-time weather data—traders adjust their positions, causing prices to move. The platform's matching engine executes trades instantly, ensuring prices remain competitive and responsive to evolving expectations about Chicago's July 7 low.
This market resolves around Jul 8, 2026, once the event has occurred and the actual low temperature for July 7, 2026 is verifiable from credible public sources. The outcome is determined by comparing reported temperature data to the predefined outcome brackets offered in the market. Traders holding shares in the correct outcome bracket receive their payout, while incorrect positions expire worthless. Resolution timing allows for confirmation of official records before final settlement.
Major climate pattern shifts, seasonal forecasts, and long-range weather models will influence trader positioning in this market. El Niño or La Niña conditions, Arctic oscillation changes, and solar activity anomalies can alter summer temperature expectations months ahead. As July 2026 approaches, weekly and daily forecasts become more precise, typically triggering sharper price movements. Real-time atmospheric data, heat waves or cold snaps in adjacent regions, and updated climate outlooks from agencies like NOAA will drive continuous repricing. Traders monitor these signals to adjust their conviction and manage exposure.