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 6, 1:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Philadelphia on July 5, 2026. The outcome will be determined by the official National Weather Service daily climatological report for Philadelphia, which measures the minimum temperature reached during that calendar day.
Resolution is based on the minimum temperature recorded at Philadelphia, PA on July 5, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Philadelphia office website under the Observed Weather tab for Philadelphia, PA. Temperature ranges are divided into six bands: 65°F or below, 66-67°F, 68-69°F, 70-71°F, 72-73°F, and 74°F or above. Each 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 NWS Climatological Report (Daily) serves as the authoritative source, superseding other weather services.
Prediction market odds often diverge from traditional weather forecasts because they incorporate real-time trader positioning and risk appetite alongside meteorological models. While meteorologists publish deterministic low-temperature predictions based on atmospheric data, this market aggregates the collective judgment of participants who have financial incentive to be accurate. Traders may price in uncertainty, tail risks, or longer-term climate patterns that standard forecasts downweight. Comparing the implied probabilities here to published analyst predictions can reveal where the market sees edge or where consensus is strongest, though both approaches ultimately depend on the same underlying weather systems.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell contracts corresponding to different temperature ranges. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each contract represents a binary outcome—either the lowest temperature falls within a specified band or it does not—and the price of each contract reflects the probability traders assign to that outcome. As demand shifts, prices move up or down, and the spread between bid and ask prices tightens or widens based on liquidity. This continuous pricing mechanism ensures that odds remain responsive to new information and evolving expectations about July 5 weather conditions.
This market resolves around Jul 6, 2026, once the lowest temperature recorded in Philadelphia on July 5, 2026 is confirmed and verifiable from credible public sources. The outcome is determined by comparing the actual observed minimum temperature against the contract ranges offered in the market. Traders who correctly predicted which temperature band would occur receive their payout, while those on the wrong side of the trade lose their stake. Resolution is final once the data is locked in and the platform processes payouts.
Several factors could shift odds significantly before resolution. Major weather pattern changes—such as the emergence of a heat dome, cold front, or tropical system—would trigger repricing as meteorological models update. Seasonal climate anomalies, including El Niño or La Niña effects, could influence long-range forecasts and trader positioning. Real-time atmospheric data releases and updated extended forecasts in the days leading up to July 5 will likely drive the most volatile moves. Additionally, historical temperature records for that date and broader summer temperature trends may anchor trader expectations and create support or resistance levels in the market.