TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 11, 2:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Chicago on July 10, 2026, using official National Weather Service data from Chicago-Midway. The outcome will be determined by the minimum temperature reading on that specific date.
Resolution is based on the minimum temperature recorded at Chicago-Midway on July 10, 2026, as reported in the National Weather Service's Climatological Report (Daily). The temperature is divided into six ranges: 62°F or below, 63-64°F, 65-66°F, 67-68°F, 69-70°F, and 71°F or above. Each range corresponds to a distinct outcome. Official data must be obtained from the NWS Climatological Report via the specified URL, selecting Chicago-Midway, IL with Daily Climate Report. While preliminary NWS data and third-party weather sources may provide guidance, the final determination uses only the official NWS Climatological Report (Daily) values. Traders should be aware that preliminary NWS reporting and measurement methods may involve rounding and conversion nuances that could affect the final reading.
Prediction market odds often diverge from traditional weather forecasts because they aggregate diverse trader perspectives and incentivize accuracy through real money stakes. While meteorologists rely on atmospheric models and historical data, this market incorporates trader conviction and updates dynamically as new information emerges. Comparing the implied probability here to official forecasts from the National Weather Service or other meteorological agencies can reveal where market participants expect conditions to differ from baseline predictions, making it a useful cross-check for understanding expected outcomes.
On Kalshi, this market is priced through a continuous order-book mechanism where traders submit bids and asks for shares tied to specific temperature ranges or outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each outcome reflects supply and demand, with higher prices indicating greater trader confidence in that result. As new weather data or forecasts become available, traders adjust their positions, causing prices to shift in real time and revealing updated market expectations for Chicago's low temperature on the target date.
This market resolves around Jul 11, 2026, once July 10, 2026 has passed and the actual lowest temperature in Chicago can be verified. The outcome is confirmed against credible public sources such as the National Weather Service or other authoritative weather records. Traders' positions settle based on which temperature range or threshold the verified data falls into, with payouts distributed accordingly to those who correctly predicted the outcome.
Major weather pattern shifts, seasonal climate anomalies, and updated long-range forecasts from meteorological agencies can all drive significant price movements in this market. Traders monitor atmospheric pressure systems, jet stream positioning, and historical temperature trends for early July in Chicago. Additionally, broader climate data releases or unexpected weather events in preceding weeks may prompt traders to reassess their positions. As the event date approaches, increasingly accurate short-range forecasts will likely compress uncertainty and stabilize prices closer to the actual outcome.