April 13, 2026 - April 15, 2026, the Yes price for '19°C or higher' rapidly rose from 89c and stabilized at 99.65c. This is because, as the target date approaches, short-term weather forecasts have definitively confirmed that Mexico City will experience normal high temperatures well over 19°C, eliminating any remaining market uncertainty.

Predicting the daily highest temperature of a specific city is a niche prediction market derived from everyday life. While weather forecasts are ubiquitous, treating a single city's daily temperature as a standalone financial prediction event retains a moderate level of novelty.

April 14, 2026 - April 15, 2026, the price of '30°C' surged from 38.5c to 56.5c, and '31°C' jumped from 13.5c to 29.5c, while '29°C' plummeted from 42c to 6.5c. This is because real-time actual temperatures on settlement day are rising faster than expected, making it highly likely that the airport station records 30°C or 31°C. April 13, 2026 - April 14, 2026, the price of '30°C' surged from 18.5c to 36.5c, and '28°C' plummeted from 24.5c to 5.55c, as market participants aggressively bet on anomalous heat due to updated short-term weather models close to settlement. April 13, 2026, '24°C' dropped from 20.5c to 1.3c, '25°C' from 32.5c to 1.75c, '26°C' from 20.5c to 4.2c, and '27°C' from 20.5c to 7.0c, as weather forecasts confidently ruled out the likelihood of unusually low temperatures.

There is a significant divergence. Mainstream weather forecasts (e.g., AccuWeather) still project the high temperature for Shenzhen on April 15 to be around 28°C to 29°C, yet the prediction market heavily favors 30°C and above (combined probability > 75%). This divergence occurs because prediction market traders are closely monitoring real-time observational data from the airport station (ZGSZ) on the actual day, which is running noticeably hotter than the smoothed forecast values provided by mainstream platforms.

2026-04-14 to 2026-04-15, the price of the 30°C option surged from 27.5c to 63.5c, while the 31°C option fell from 34c to 20c, and the 32°C option fell from 24c to 12c. This was due to the latest day-of weather forecast confirming thunderstorms, leading to heavily downgraded temperature expectations. 2026-04-13 to 2026-04-14, the price of the 30°C option surged from 21.5c to 34c, while the 32°C option plummeted from 28.5c to 16.5c. This was due to updated weather forecasts predicting thunderstorms and rain on April 15, which lowered the expected maximum temperature.

Between April 14, 2026 and April 15, 2026, the price of '74°F or higher' plummeted from 77.5c to 42.5c, while '72-73°F' surged from 14c to 34.5c. This occurred because as the resolution date approaches, updated weather models slightly downgraded the expected high temperature on April 15, shifting consensus away from extreme highs toward the 72°F mark. Between April 13, 2026 and April 14, 2026, the '74°F or higher' option surged from 28c to 48c (peaking at 77.5c), and '72-73°F' rose from 23c to 33c. Meanwhile, all temperature brackets of 71°F and below plummeted by more than 10c. This massive shift is due to the increasing stability of weather models as the resolution date nears, with forecasting agencies uniformly revising the expected high temperatures upwards.