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: May 30, 8:00 PM EST
Polymarket
This market tracks whether Seoul will receive between 120–130 millimeters of total precipitation during May 2026. On Polymarket, the probability of this outcome stands at 87.5%. Resolution will be determined by the Korea Meteorological Administration's official monthly precipitation data for Seoul, measured to one decimal place and finalized by July 7, 2026. Watch for the KMA's official precipitation report once May 2026 concludes to see whether Seoul's actual rainfall total falls within the predicted range.
Prediction market odds reflect real-money trader expectations and often incorporate meteorological forecasts, historical precipitation patterns, and seasonal climate models. Unlike traditional analyst reports, markets aggregate diverse viewpoints into a single probability through continuous trading. Seoul's May precipitation is influenced by early monsoon activity and spring weather systems, which meteorologists monitor closely. Market odds may diverge from static forecasts because traders update positions dynamically as new weather data emerges. Comparing Polymarket odds to seasonal climate outlooks from Korean meteorological agencies can reveal whether traders are pricing in above-average or below-average rainfall relative to expert consensus.
The market resolves on May 31, 2026, after May concludes and final precipitation data for Seoul becomes available. Resolution depends on official precipitation measurements recorded during the month, typically sourced from South Korea's meteorological authority or established weather stations in Seoul. The specific outcome categories—such as ranges like 100–110 mm—are determined by comparing actual cumulative rainfall against the predefined thresholds set at market creation. Once verified data is published, the market settles to the outcome that matches the recorded precipitation total for May in Seoul.
Key catalysts include updated seasonal climate forecasts from meteorological agencies, early spring weather patterns, and historical May precipitation trends for Seoul. El Niño or La Niña conditions can influence East Asian rainfall. Real-time weather radar data, atmospheric pressure systems, and jet stream positioning in late April and early May will drive trader positioning. Tropical cyclone activity or monsoon onset timing could significantly shift odds. Additionally, any revision to official precipitation measurement methods or data sources might affect market expectations. Traders monitor both long-range forecasts and short-term weather models as May approaches to adjust positions based on evolving precipitation probabilities.