TOTAL VOLUME:
$154.5b
24H VOL:
$271,200,656
24H TRANSACTIONS:
2,984,640,614
OPEN INTEREST:
$1,922,627,141
420,368
Markets across
40,352
events
MATCHED EVENTS:
4,484
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 26, 2:00 AM EST
Kalshi
This event tracks whether measurable rainfall will occur in various U.S. cities over a specific weekend. Each location has its own criteria for resolving the outcome based on precipitation data from official sources.
Each market evaluates whether any measurable precipitation occurs in a specified U.S. city during the weekend of October 24–25, 2026. For a market to resolve as "Yes," the total precipitation recorded at the designated weather station for that city must exceed zero inches on at least one day within the period. "Trace" amounts and missing data are treated as zero inches. All outcomes rely on official data from the Weather Company, accessed via weather.com/kalshi, ensuring consistency across markets despite variations in third-party weather forecasts. The evaluation window covers both days of the weekend, and any positive measurement—no matter how small—triggers a "Yes" resolution. This structure applies uniformly across all 35 markets, each tied to a specific city and its corresponding weather station identifier.
Comparing prediction market odds to those of traditional weather analysts reveals interesting insights. While analysts often rely on complex models and historical data, this market aggregates the wisdom of the crowd, reflecting real-time perceptions of potential rainfall. Often, the market will align with expert forecasts, but divergences can occur as new information emerges or as traders incorporate subjective factors. It’s a dynamic comparison, with this market constantly adjusting as conditions evolve and new data becomes available.
On Kalshi, this market is priced using a continuous double auction, meaning traders buy and sell contracts representing the probability of rain. The price of a contract reflects the market’s collective belief about the likelihood of the event occurring. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate, the price converges towards what the market deems a fair representation of the probability. The current price indicates the implied probability, and changes in volume and trading activity directly influence price movements.
This market resolves around Oct 27, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on whether measurable precipitation is recorded in the specified locations during the designated weekend timeframe. The determination will rely on official weather data from recognized meteorological sources, ensuring an objective and verifiable result. The market will then settle based on whether rain occurred as predicted.
Several signals could significantly impact this market. Changes in short-term weather forecasts, particularly those issued by the National Weather Service, will likely drive price fluctuations. Unexpected shifts in jet stream patterns or the development of a low-pressure system could also cause traders to reassess probabilities. Even news reports about potential storms or drought conditions could influence trading activity, leading to movements in the odds. Increased volume as the weekend approaches will also likely amplify any price swings.