TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 21, 3:00 AM EST
Kalshi
This event tracks whether measurable rainfall will occur in various major U.S. cities over a specific weekend. Each location has its own criteria for what constitutes a positive outcome based on precipitation data. The resolution depends on official weather measurements for each city.
Each market corresponds to a specific U.S. city and resolves to 'Yes' if the total precipitation recorded at the designated weather station for that city exceeds zero inches on either September 19 or September 20, 2026. 'Trace' amounts and missing data are counted as zero. All outcomes are determined using official data provided by The Weather Company, ensuring consistency across all locations despite variations in consumer weather sources. The evaluation period covers both days of the weekend, with any measurable rain on either day satisfying the condition for a 'Yes' result. Each city's measurement point is clearly specified, and the same data interpretation rules apply uniformly to all markets.
Currently, prediction market odds represent a different perspective than traditional weather analyst forecasts. While analysts often rely on complex models and historical data, this market reflects the collective judgment of individuals incentivized to accurately predict the outcome. Discrepancies can arise due to differing interpretations of data, the inclusion of subjective factors, or simply the ‘wisdom of the crowd’ effect. If analysts predict a 60% chance of rain, this market might show a different probability based on traders’ assessments of those same factors, or new information not yet incorporated into the analyst models.
On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing different outcomes – in this case, whether or not it will rain in specific locations this weekend. The price of each contract reflects the market’s current assessment of its probability. As more traders participate, the prices adjust to reflect the evolving consensus. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Price movements are driven by new information, changing weather patterns, and traders’ reactions to those changes, creating a dynamic and responsive pricing mechanism.
This market resolves around Sep 22, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on official rainfall measurements reported by established meteorological sources. These sources will determine whether the specified rainfall thresholds have been met in the locations covered by this market. The outcome will be determined by whether or not it rained at the specified locations during the designated weekend period, as verified against credible public sources.
Several signals could significantly move this market before it resolves. Changes in weather forecasts, particularly the issuance of storm warnings or the shift in predicted rainfall patterns, would likely cause price fluctuations. Unexpected weather events, such as the rapid development of a low-pressure system, could also trigger substantial movement. Additionally, any news related to climate patterns or unusual atmospheric conditions could influence traders’ assessments and impact the market. Overall, any new information impacting the probability of rainfall this weekend has the potential to move this market.