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: Jun 13, 1:00 AM EST
Kalshi
This event forecasts the peak temperature in Boston on June 12, 2026. Traders predict which temperature range the day will reach, based on official National Weather Service measurements from Boston Logan Airport.
Resolution is determined by the maximum temperature recorded at Boston on June 12, 2026, as reported by the National Weather Service's Climatological Report (Daily) for Boston (Logan Airport), MA. The official data source is accessed via the NWS website at https://www.weather.gov/wrh/climate?wfo=box under the Observed Weather tab. Temperature ranges are: 87°F or below, 88-89°F, 90-91°F, 92-93°F, 94-95°F, and 96°F or above. The NWS Climatological Report (Daily) is the authoritative source for resolution; preliminary data and third-party weather services are for reference only. Traders should be aware that preliminary NWS reporting and measurement methods may involve rounding and conversion nuances that could affect final determination.
Prediction market odds reflect real-time trader consensus and often diverge from traditional weather forecasts or analyst models. While meteorologists rely on atmospheric data and historical patterns, this market aggregates the collective judgment of participants with financial incentives to predict accurately. Comparing odds here to published forecasts from the National Weather Service or other meteorological bodies can reveal where traders see upside or downside risk. Such gaps sometimes signal emerging data or market inefficiencies worth monitoring as the resolution date draws closer.
On Kalshi, this market is priced through an order-book mechanism where buyers and sellers submit bids and asks for different temperature outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Prices move continuously as new trades execute, reflecting updated expectations about June 12 conditions in Boston. Each outcome contract trades independently, and the implied probability of any given temperature range is derived from its current market price. Liquidity and trading volume directly influence how quickly prices adjust to new information.
This market resolves around Jun 13, 2026, once June 12, 2026 has passed and the day's highest temperature in Boston is verifiable from credible public sources. The outcome is determined by the actual recorded high temperature on that date, confirmed through established meteorological reporting. Traders holding contracts aligned with the final temperature outcome receive their payouts after verification. Until resolution, prices may continue to shift based on updated forecasts and real-time weather developments.
Several factors could shift odds in this market before resolution. Updated seasonal forecasts, climate pattern shifts, or anomalous weather systems developing weeks or days before June 12 may trigger repricing. Major atmospheric events—such as heat waves, cold fronts, or unusual jet-stream behavior—often prompt rapid trader response. Additionally, historical temperature records for that date and time-of-year comparisons serve as anchors; any new data suggesting deviation from the norm can drive trading activity and price changes.