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 7, 1:00 AM EST
Kalshi
This market tracks the highest temperature recorded in Boston on July 6, 2026. The outcome is determined by the maximum temperature reading from the National Weather Service's official daily climatological report for Boston Logan Airport.
Resolution is based on the maximum temperature recorded at Boston on July 6, 2026, as reported in the National Weather Service's Climatological Report (Daily) for Boston (Logan Airport), MA. The official data source is accessed through the NWS Regional Headquarters website under the Observed Weather tab. Temperature ranges are divided into six bands: 68°F or below, 69-70°F, 71-72°F, 73-74°F, 75-76°F, and 77°F or above, with each band corresponding 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 for resolution, superseding other weather data sources.
Prediction market odds reflect real-money trader consensus and often diverge from traditional meteorologist forecasts because they incorporate a broader range of information, including long-range climate patterns and historical precedent. While weather analysts typically issue deterministic point forecasts or narrow ranges, this market aggregates probabilistic views from many participants with financial skin in the game. Traders may price in tail-risk scenarios or seasonal anomalies that formal forecasts downweight. Comparing the two reveals whether the market is more bullish or bearish on extreme heat than official guidance suggests, offering a useful cross-check on consensus expectations.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell shares corresponding to different temperature ranges or outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each outcome has a bid-ask spread that tightens as volume increases, and the mid-price reflects the marginal trader's belief about the likelihood of that outcome occurring. Traders can enter limit or market orders to express their view, and prices update continuously as new information arrives or sentiment shifts. The platform's matching engine ensures transparent price discovery throughout the trading period.
This market resolves around Jul 7, 2026, after July 6, 2026 has passed and the actual peak temperature for Boston is recorded. The outcome is confirmed once the verified high temperature for that day is available from credible public sources. Traders holding shares in the outcome that matches the recorded temperature receive their payout, while other positions expire worthless. The resolution process is deterministic and based on observable, historical weather data rather than subjective judgment.
Major signals include updated seasonal climate forecasts, El Niño or La Niña patterns, and historical heat-wave data for early July in the Northeast. Unexpected atmospheric events such as heat domes, jet-stream anomalies, or tropical system activity could shift trader expectations significantly. Long-range weather model updates issued by NOAA or other meteorological agencies often trigger repricing. Additionally, broader climate trends and any unusual warming patterns observed in the months leading up to July 2026 may influence how traders price the probability of record or near-record temperatures on that specific date.