TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 9, 2:00 AM EST
Kalshi
Minneapolis will experience varying heat levels on July 8, 2026. The actual maximum temperature recorded by the National Weather Service will determine which temperature range occurred that day. This market tracks the peak daytime temperature in the city.
Resolution is determined by the maximum temperature recorded at Minneapolis on July 8, 2026, according to the National Weather Service's Climatological Report (Daily). The official data source is accessed through the NWS Regional Headquarters website by navigating to the Observed Weather tab and selecting Minneapolis/St Paul, MN with Daily Climate Report. Temperature ranges are stratified into six outcomes: 77°F or below, 78-79°F, 80-81°F, 82-83°F, 84-85°F, and 86°F or above. Traders should note that preliminary NWS reporting may be subject to rounding and conversion nuances, and the final official NWS Climatological Report (Daily) serves as the authoritative source rather than preliminary data or third-party weather services.
Prediction market odds often diverge from traditional weather forecasts because they incorporate real-time trader sentiment and financial incentives alongside meteorological models. While the National Weather Service and other agencies publish deterministic temperature predictions, this market reflects the collective judgment of participants who have financial stakes in the outcome. Traders may weight recent atmospheric patterns, historical July weather in Minneapolis, or emerging climate signals differently than official forecasters. Over time, prediction markets have demonstrated competitive accuracy against expert predictions, particularly when liquidity is sufficient and participants have diverse information sources.
On Kalshi, this market is priced through an order-book mechanism where traders submit bids and asks for outcome shares. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome—representing a specific temperature range for July 8, 2026—has its own price, typically expressed as a percentage probability. As traders buy and sell shares, prices adjust in real time to reflect changing expectations. The spread between bid and ask prices narrows or widens based on liquidity and conviction; tighter spreads indicate higher confidence and trading volume, while wider spreads suggest uncertainty or lower participation.
This market resolves around Jul 9, 2026, once the highest temperature recorded in Minneapolis on July 8, 2026 is verifiable from credible public sources. The outcome is determined by comparing actual weather data against the temperature ranges defined in each outcome option. Traders who selected the range matching the verified high temperature receive their payout, while other positions expire worthless. Resolution typically occurs within hours of the market end date, pending confirmation of the official temperature reading.
Several factors could shift odds in this market. Long-range seasonal forecasts indicating warmer or cooler patterns across the Upper Midwest would influence pricing. Major weather systems—such as heat domes, cold fronts, or atmospheric blocking patterns—developing weeks or days before July 8 could trigger significant repricing. Historical analogs, such as past July heat waves in Minneapolis, may prompt traders to adjust positions. Urban heat island effects, drought conditions, or anomalous jet stream behavior closer to the event date could also move the market. Real-time forecast updates from meteorological agencies in the days leading up to July 8 typically generate the most volatile price movements.