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 7, 2:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Chicago on July 6, 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 6, 2026, as reported in the National Weather Service's Climatological Report (Daily). The temperature is divided into six ranges: 59°F or below, 60-61°F, 62-63°F, 64-65°F, 66-67°F, and 68°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 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) value. 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 analyst forecasts because they incorporate real-time trader positioning and financial incentives alongside meteorological models. While professional forecasters rely on physics-based simulations and historical patterns, this market aggregates the distributed knowledge of participants betting their own capital on the outcome. Traders may price in uncertainty, tail risks, or emerging data that analysts have not yet fully weighted. Comparing the two reveals where market participants see value relative to consensus forecasts, though both approaches aim to predict the same underlying temperature event.
On Kalshi, this market is priced through a continuous order-book mechanism where traders buy and sell shares corresponding to different temperature ranges. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome contract reflects the probability traders assign to that temperature band, with prices ranging from near-zero to near-unity. As new information arrives—updated weather models, seasonal anomalies, or climate data—traders adjust their positions, moving prices in real time. The spread between bid and ask prices reflects liquidity and uncertainty around the final outcome.
This market resolves around Jul 7, 2026, once July 6, 2026 has passed and the lowest temperature in Chicago for that day is verifiable from credible public sources. The outcome is determined by the actual recorded low temperature on that date, confirmed through official weather data. Traders' positions settle based on which temperature range the verified low falls into, with payouts distributed accordingly. Resolution is automatic once the data is finalized and the platform confirms the result.
Major weather pattern shifts, seasonal climate anomalies, or updated long-range forecasts from meteorological agencies could significantly move this market. El Niño or La Niña conditions, jet stream positioning, and historical temperature records for early July in Chicago all influence trader expectations. As the event date approaches, short-range forecasts become more precise, typically narrowing the range of plausible outcomes and sharpening prices. Breaking news about atmospheric conditions or climate data releases may trigger rapid repricing as participants reassess probabilities.