Betting on the specific daily high temperature of a particular city is a typical niche weather market in prediction platforms. While not as mainstream as elections, it is not an extremely bizarre or unheard-of concept.

April 15, 2026 - April 16, 2026, the price of 86-87°F surged from 11.5c to a peak of 39.5c before settling at 29c, driven by earlier weather model updates leaning towards a cooler outcome. April 15, 2026 - April 16, 2026, the price of 84-85°F spiked from 7.45c to 28.85c and then dropped to 15.6c. April 15, 2026 - April 16, 2026, the price of 90-91°F fell from a high of 28.5c to 12.5c, diverging from the latest Wunderground forecast of 91°F.

Significant divergence exists. The latest Wunderground forecast for April 17 explicitly mentions 'Near record high temperatures. High 91F', yet the market prices the 90-91°F option at only 12.5c, heavily favoring 88-89°F and 86-87°F instead. This is likely due to delayed market reaction or traders using alternative weather forecast sources without strictly adhering to the Wunderground-specific resolution criteria.

Significant trap exists: The title asks for the highest temperature in Seoul, but the rules specify the Incheon Intl Airport Station. Being a coastal city, Incheon's temperatures often differ notably from central Seoul. Traders relying solely on the title are at high risk of being misled. Additionally, temperatures are resolved to whole degrees, making rounding a potential edge-case risk.

April 16, 2026 - April 17, 2026, the price of the '18°C or higher' option fluctuated between 70.5c and 85c, eventually settling around 78c, because as the resolution date approached, actual forecasts showed the high temperature was highly likely to reach 65°F (approx. 18.3°C), solidifying market confidence. April 15, 2026 - April 16, 2026, the price of the '18°C or higher' option surged from 38c to 77.5c. The reason is that as the expiration date approaches, updated weather forecasts confirmed a significant warming trend, with highs expected to reach or exceed 18°C. April 15, 2026 - April 16, 2026, the prices of the '16°C' and '15°C' options plummeted from 18c and 20.5c down to near zero respectively, as temperature expectations were revised upwards and lower-range options were heavily sold off by the market to reprice.

While weather forecasting is an everyday topic, betting on the exact daily temperature range of a specific city on prediction markets is a somewhat niche and novelty play.

Between April 15, 2026, and April 16, 2026, the price of 28°C dropped from 27.5c to 10.5c, and the price of 30°C fluctuated upward from 17.5c to 35.5c before settling at 31.5c. This was due to the latest weather forecast model updates, which slightly adjusted the expected high temperature center to the 29°C-30°C range.

On April 16, 2026, the price of the 16°C option surged from 16.5c to 32.5c, driven by the latest weather forecasts revising the high temperature downward as the resolution day approaches. On April 16, 2026, the price of the 18°C option plummeted from 22.5c to 12.5c, as weather forecasts indicated temperatures would not be as warm as previously expected. On April 16, 2026, the price of the 15°C or below option spiked from 8.4c to a peak of 26.95c before settling at 19.65c, reflecting drastic shifts in market expectations regarding a passing cold front.

This is a relatively niche market. While checking the weather forecast is an everyday activity, predicting the exact highest temperature at a specific airport on a specific day is not something the general public typically thinks about, making it a classic weather derivative betting market.

April 16, 2026 - April 17, 2026, the 21°C option surged from 34.5c to 47.5c, while the 22°C option dropped from 25.5c to 12.5c, as the latest day-of meteorological forecasts further converged the expected peak temperature toward 21°C. April 16, 2026, the Yes price for the 22°C option experienced significant volatility, surging from a low of 17.5c to 34c before pulling back to 28.5c, due to high-frequency weather forecasts repeatedly tweaking the expected peak between 21°C and 22°C shortly before resolution. April 15, 2026 - April 16, 2026, the Yes price for the 20°C option surged from 15c to a peak of 34.5c (before settling down to 15.5c), while the 18°C option plummeted from 13.5c down to 0.45c. This was driven by the approaching resolution date and updated, high-precision short-term weather forecasts that completely ruled out lower temperatures, securely locking the expected high in the range above 20°C.