Predicting the highest temperature of a specific city on a specific day is not entirely rare in prediction markets, but it is not a mainstream topic of interest for the general public, giving it a somewhat niche and novelty aspect.

May 7, 2026 - May 8, 2026, the price of 14°C surged from 14.5c to 37c, while 16°C plummeted from 36c to 18.5c, 17°C dropped from 22.5c to 9.5c, and 18°C fell from 11.6c to under 1c. The reason is that the latest weather models significantly revised downward the expected high temperature for Warsaw on May 9 (down to around 13-15°C). No significant price movements exceeding 10 cents had been observed over the past 3 days prior to this new development.

Predicting the highest daily temperature in a specific city is a relatively niche market. Although weather forecasting is a standard category in prediction markets, the general public rarely thinks about or bets on such highly micro-level questions in daily life unless an extreme weather event is expected.

May 7, 2026 - May 8, 2026, the price of 26°C surged from 18c to 43.5c, as weather models converged to predict a high of around 26°C (79°F) at the Wuhan airport. May 7, 2026 - May 8, 2026, the price of 27°C spiked from 16c to a high of 35.5c before settling at 27.5c, reflecting market hesitation between 26°C and 27°C, which corrected as forecasts became clearer. May 7, 2026 - May 8, 2026, the price of 25°C fluctuated, rising to 29c before dropping to 17.5c, as earlier cooler forecasts were revised slightly upwards.

On May 8 to May 9, 2026, the price of '26°C' continued to surge from roughly 62.0c to 91.0c, while '27°C or higher' quickly retreated from 36.0c to 8.5c. This occurred because, as May 9 officially began (in the Hong Kong time zone), weather forecasts and morning temperatures further narrowed the margin of error for the maximum temperature, highly locking it within the 26°C range and reducing the probability of extreme heat. Between May 7 and May 8, 2026, the price of '26°C' surged from 33.5c to 52.5c, and '27°C or higher' surged from 12.5c to 37.5c, while '25°C' plummeted from 39.5c to 8.5c. This was caused by updated meteorological forecasts near the resolution date significantly raising the maximum temperature expectations, prompting market capital to quickly shift to higher temperature options.

May 8, 2026 - May 9, 2026, the price of 21°C steadily climbed from 17.5c to 35.75c, and '22°C or higher' briefly spiked to 26c before falling back to 14.5c, while 20°C plunged from a high of 44c to 32.5c. This was driven by short-term nowcasting data indicating stronger warm southwesterly winds under a high-pressure system, raising the expected high and shifting capital to 21°C and above. May 7, 2026 - May 8, 2026, the price of 18°C plummeted from 23c to around 1.1c, and 19°C dropped from 31.5c to 17c. The reason was the invalidation of earlier cooler forecasts as meteorological agencies uniformly issued sunny and warming forecasts, draining probability weight from lower temperature brackets.