The title asks for the highest temperature in Seoul, but the resolution rules explicitly specify the Incheon Intl Airport Station (RKSI). Incheon Airport is located on the coast/island, and its temperatures often differ significantly from inland central Seoul (potentially by several degrees). This geographic mismatch between the headline and the specific resolution source is a major trap for traders who don't read the fine print.

April 14, 2026, the price of the 23°C option surged from 26.5c to 99.85c, while the 24°C or higher option crashed from 56c to near 0c. This occurred because the daily temperature peaked at 23°C in the afternoon local time and began dropping, ruling out the 24°C outcome. April 14, 2026 (earlier), the price of 24°C or higher surged from 13.5c to 56c, and 23°C rose significantly to 45c, while options for 22°C and below crashed to near 0c. The reason is that real-time daytime temperatures in Seoul had already exceeded 22°C, rendering lower options obsolete. April 12, 2026 - April 13, 2026, the price of 22°C surged from 15c to 33c, and the price of 23°C spiked from 9c to 28c, as newly released weather forecast models revised the expected high temperature for April 14 into this range.

April 13, 2026 - April 14, 2026, the price of 17°C heavily fluctuated, dropping from 43.5c to 10.5c before rebounding to 27.5c, as intraday real-time forecasts hovered between 61°F and 62°F, directly impacting the rounded Celsius outcome. April 13, 2026 - April 14, 2026, the price of 15°C surged from 16.5c to 32.5c before falling back to 15.5c, driven by brief concerns over cloud cover limiting the high, before forecasts reaffirmed warmer trends. April 12, 2026 - April 13, 2026, the price of 16°C surged steadily from 17.5c to a peak of 52.5c before settling at 38.5c, as models became highly confident in a peak of at least 16°C. April 12, 2026 - April 13, 2026, the price of 14°C plummeted from a high of 23c to under 1c, because updated forecasts consistently indicated temperatures would exceed 14°C significantly.

Between 07:13 and 10:28 on April 14, 2026, the price of 29°C surged from 0.65c to 99.7c, while 28°C collapsed from 99.35c to 0.05c. This was due to the afternoon temperature in Hong Kong breaking the 29°C threshold, causing the market to aggressively price in the winning bracket. Between 14:58 on April 13 and the current time on April 14, 2026, the price of '30°C or higher' plummeted from 36.5c to near zero, as real-time data made hitting 30°C highly unlikely. Between 21:43 on April 12 and 07:28 on April 13, 2026, the price of 27°C plummeted from 14c to 4c, due to an upward shift in the forecasted temperature range. Between 05:28 and 06:33 on April 12, 2026, the price of 29°C dropped from 27.5c to 17c, and 28°C fell from 41c to 36c, reflecting short-term trading volatility as bettors hedged based on varying forecasts.

The title mentions 'Denver', but the rules strictly specify using data from the Buckley Space Force Base Station (located in Aurora). Users relying on generic Denver weather forecasts (which typically use Denver International Airport data) may face discrepancies due to microclimates and station location differences if they ignore the specific Wunderground link.

April 14, 2026 - April 14, 2026, the price of the 62-63°F option plunged from 39c to 21.5c, while the 60-61°F option surged from 15.5c to 32c and the 58-59°F option surged from 8c to 25.5c. This was due to real-time morning meteorological models further revising the day's high temperature downwards, as cold air and precipitation effects were stronger than expected. April 13, 2026 - April 14, 2026, the price of the 58-59°F option plunged from 29c to 8c, because the latest weather forecasts slightly raised the expected high temperature, indicating the cooling effect from rain would be less severe than anticipated, causing capital to shift towards the 62-63°F range. April 12, 2026 - April 13, 2026, the price of the 58-59°F option surged from 12c to 27.5c, as updated forecasts confirmed the cooling effect of expected precipitation, lowering the projected high temperature. April 12, 2026 - April 12, 2026, the price of the 66°F or higher option plunged from 39c to 5.5c, because short-term weather forecasts explicitly ruled out the possibility of extreme heat on April 14. April 12, 2026 - April 12, 2026, the price of the 60-61°F option surged from 13c to 24.5c, while the 64-65°F option plunged from 26.5c to 16c. This occurred because meteorological platforms like Wunderground updated their forecasts, revising the expected high temperature down to around 60°F.

Between April 14, 2026 05:53 and 09:08, the price of '18°C or below' surged from 78.4c to 99.5c. This occurred because Beijing time entered the evening, and the daily highest temperature was finalized at or below 18°C, eliminating all uncertainty. Between April 14, 2026 00:28 and 03:43, the price of '18°C or below' skyrocketed vertically from roughly 3.4c to 64.2c, while '20°C' and '21°C' collapsed from 32c and 28.5c to single digits, respectively. This was driven by actual weather observations on settlement day showing significantly lower temperatures than initially expected, confirming a cold trend. Between April 12 and April 13, 2026, the price of '20°C' rose from about 24.5c to a peak of 35c before dropping to 19c, driven by expectation shifts due to real-time weather data updates as the settlement date approached. Between April 12 and April 13, 2026, the price of '18°C or below' plummeted from 38c to around 9c as the likelihood of actual temperatures exceeding this threshold increased significantly. Between April 12 and April 13, 2026, the price of '23°C' crashed from 25.5c to around 3.4c, as the probability of reaching 23°C was disproven by the market over time.