TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 11, 1:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Philadelphia on July 10, 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 10, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Eastern Region Climate portal under the Philadelphia, PA location with Daily Climate Report selected. 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. While secondary sources like AccuWeather or Google Weather may provide guidance, only the NWS Climatological Report (Daily) serves as the authoritative resolution source.
On Kalshi, this market is priced through a continuous order-book mechanism where traders submit bids and asks for each temperature outcome. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of any outcome reflects the marginal probability traders assign to it, with higher prices indicating greater confidence. As new information arrives—weather models update, historical patterns emerge, or seasonal trends shift—traders adjust their positions, moving prices in real time. This dynamic pricing ensures the market continuously incorporates fresh signals about the lowest temperature expected on July 10, 2026.
This market resolves around Jul 11, 2026, once July 10, 2026 has passed and the day's lowest temperature can be verified. The outcome is determined by comparing actual recorded temperatures against the outcome ranges traders have wagered on, with results confirmed through credible public reporting. Traders holding shares in the correct outcome receive their payout, while incorrect positions expire worthless. The resolution process is straightforward: the event occurs, the data is published, and payouts follow automatically based on which outcome bracket the verified temperature falls into.
Several factors could shift odds in this market over the coming months. Updated seasonal forecasts and long-range weather models may suggest warmer or cooler conditions for early July 2026. Historical temperature patterns for Philadelphia in mid-summer, combined with climate trends, could influence trader positioning. Major atmospheric events—such as shifts in jet stream patterns or the development of heat domes—would likely trigger repricing. Additionally, as July 10 approaches, short-range forecasts become more reliable, typically causing the market to converge toward the meteorologically most probable outcome and narrowing the range of plausible temperatures.