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 8, 1:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Boston on July 7, 2026, using official National Weather Service data from Boston Logan Airport. The outcome is determined by which temperature range the daily minimum falls into, ranging from 55°F or below up to 64°F or above.
Resolution is based on the minimum temperature recorded at Boston Logan Airport on July 7, 2026, as reported in the National Weather Service's Climatological Report (Daily). The official data source is accessed via the NWS Boston office website under the Observed Weather tab for Boston (Logan Airport), MA with Daily Climate Report selected. Temperature ranges are: 55°F or below, 56-57°F, 58-59°F, 60-61°F, 62-63°F, and 64°F or above. Traders should note that preliminary NWS data may be subject to rounding and conversion nuances, and the final official NWS Climatological Report (Daily) value takes precedence over other weather sources.
Prediction market odds reflect real-money stakes from traders making independent judgments, often incorporating diverse data sources and local expertise. Traditional weather forecasts from meteorologists typically rely on numerical models and historical patterns. This market's odds may diverge from official forecasts because traders price in longer-term uncertainty, regional microclimates, and emerging climate signals that standard models update less frequently. Comparing the two reveals whether the market is pricing in more optimistic or pessimistic temperature scenarios than institutional forecasters.
On Kalshi, this market is priced through an 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 trades independently, and the price of each reflects the implied probability that the low temperature will fall within that bracket. Traders profit by correctly predicting the actual low, and the market price adjusts continuously as new information arrives and positions shift, creating a dynamic real-time forecast of July 7 conditions in Boston.
This market resolves around Jul 8, 2026, once the lowest temperature recorded in Boston on July 7, 2026 is verified and confirmed. The outcome is determined by comparing the actual observed low against the temperature brackets defined in the market. Resolution relies on credible public reporting of weather data, ensuring all traders have access to the same factual basis for settlement. Positions are settled automatically once the event outcome is finalized.
Major climate patterns—including Atlantic hurricane activity, heat domes, and jet stream positioning—can shift odds significantly weeks or months ahead. Seasonal forecasts from NOAA or international meteorological agencies often trigger repricing as traders incorporate updated model guidance. Shorter-term catalysts include weekly weather updates, anomalous temperature swings in June, and any unusual atmospheric conditions reported in early July. Real-time satellite data and local Boston weather alerts in the days before July 7 typically drive the most volatile price movements as the event date nears.