On April 28, 2026, Seoul's maximum temperature will be measured against a specific 9°C threshold in this prediction market. A high of 9°C or below would represent unusually cold weather for late April in Seoul, when the region typically experiences mild spring conditions with daily highs averaging 20-22°C. The current market odds of 0% reflect strong trader consensus that Seoul will experience warmer conditions than this threshold, indicating confidence in normal seasonal progression. This market is part of a recurring daily temperature series offered on the platform, allowing traders to speculate on whether Seoul's official daily high—measured at the Korea Meteorological Administration's observation station—will remain at or below the specified threshold. April 28 falls in mid-spring, a period when Seoul typically experiences mild to warm weather as the region transitions from cooler spring months into early summer. Understanding this market requires familiarity with Seoul's seasonal weather patterns and the statistical likelihood of cold snaps at this particular time of year.
Deep dive — what moves this market
Seoul's climate in late April represents a critical transition period between spring and early summer, with normal maximum temperatures typically ranging from 20 to 23 degrees Celsius. A high of 9°C or below would be substantially colder than typical conditions, representing approximately a 10 to 13 degree Celsius deviation from seasonal norms. To understand what meteorological conditions would drive such unusually cold temperatures, we must examine the prevailing weather patterns and atmospheric dynamics across East Asia during late April. Cold air outbreaks originating from Siberia remain physically possible but become increasingly rare as the season progresses toward summer, requiring a significant and anomalous shift in the jet stream configuration. The Korean peninsula typically experiences cold snaps and freezing air masses earlier in the spring season, particularly in March and early April, when Siberian air masses can more readily push southward across the continent. Historical temperature records from recent decades show that April 28 dates have consistently recorded maximum temperatures well above the 9°C threshold, with typical values falling between 18 and 25 degrees Celsius. The 0% market odds reflect unanimous trader conviction that no significant cold surge is being forecast for this specific date. Current weather models would need to signal an unusual blocking pattern, an unexpected arctic outflow event, or some other anomalous atmospheric condition to justify lower prices on a YES outcome. Traders appear to be pricing in the normal seasonal progression toward warmer spring and early summer weather, combined with the more stable and anticyclonic pressure patterns that typically characterize late April weather systems in East Asia. The extreme thinness of odds at 0% indicates that market participants view even near-normal weather forecasts as incompatible with achieving a maximum temperature of just 9°C, reflecting overwhelming confidence that Seoul temperatures will remain substantially above this barrier.
What traders watch for
Korea Meteorological Administration official daily maximum temperature observation for Seoul released at midnight UTC April 28.
Any unexpected cold front or arctic air intrusion developing in the days leading into April 28 across the Korean peninsula.
Upper-level atmospheric patterns, jet stream positioning, and pressure system evolution in the five days before April 28.
Overnight low temperatures and morning thermal recovery during daylight hours on April 28.
How does this market resolve?
The market resolves on April 28, 2026, based on the official maximum temperature reading from the Korea Meteorological Administration for Seoul. YES resolves if the recorded high is 9°C or below; NO if it exceeds 9°C.
Prediction markets aggregate trader expectations into real-time probability estimates. On Polymarket Trade, every market question resolves YES or NO based on a specific event outcome; traders buy shares of the side they believe will resolve positively. Prices range 0¢ (certain no) to 100¢ (certain yes) and naturally reflect the crowd-implied probability of YES. This page summarizes the market state for readers arriving from search; for live trading (place orders, see order book depth, execute a trade) open the full interactive page linked above.
