Taipei Hit 31°C on June 25: Polymarket Resolves | Lines.com

The highest temperature recorded at Taipei Songshan Airport Station on June 25, 2026 reached exactly 31 degrees Celsius, resolving this Polymarket categorical weather market at full certainty. The 31°C outcome bucket closed at a price of 1.00, confirming the market’s final settled state as of the June 25 end date. Every other temperature outcome, from 28°C or below to 38°C or higher, expired at zero.

The market priced 31°C at just 0.20 (20%) when it opened, reflecting genuine uncertainty across eleven possible temperature buckets. By resolution, that price had moved to 1.00. Traders committed $116,899 in total volume, with $87,607 of that flowing in during the final 24 hours alone. The market is pricing uncertainty, not science, and once the Songshan observational data locked in, the price did exactly what it should have: it went to one.

What the Measurement Showed on June 25

Taipei Songshan Airport Station is the authoritative observational source for these Polymarket weather markets. The station logged a daily high of 31°C on June 25, placing the result squarely in the middle of the 11-bucket range. The outcome sits at the upper boundary of the late-June historical average for Taipei, which typically sees daily highs in the 29°C to 31°C range by the final week of the month. No extreme anomaly, no record-breaking heat. Just a statistically coherent late-June afternoon in a subtropical city.

The final 24-hour price trajectory told the story clearly. The 31°C bucket gained 58.5% on June 25 itself, the largest single-day move in the market’s life. On June 24, two separate price jumps of 6.8% and 18.4% suggested traders were already narrowing their probability mass toward the 31°C bucket as forecast models tightened. By the time Songshan confirmed the reading, the market had already done most of its convergence work.

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How the Market Priced a 31°C Outcome

At a starting price of 0.20, the 31°C bucket was neither the favorite nor an outlier. Spread across 11 possible outcomes, a flat distribution would assign each bucket roughly 9%. The 20% opening implied traders saw 31°C as the single most likely outcome, but still heavily discounted by the raw probability of any specific one-degree band resolving YES. Here’s what the measurements are telling us: the market was structurally well-calibrated for a multi-outcome weather question. It opened with appropriate uncertainty and resolved with zero ambiguity.

Total volume of $116,899 across the full market life demonstrates genuine trader conviction. Liquidity reached $45,922, supporting meaningful price discovery rather than thin-market noise. The $87,607 in 24-hour volume represents 75% of total market activity concentrating on the final day, a pattern consistent with weather markets that rely on actual observational data rather than speculative forecasts.

What a 31°C Reading Means for Taipei in Late June

Taipei sits in a humid subtropical climate zone, and late June marks the transition from the plum rain season toward the more intensely hot and dry conditions of July and August. A 31°C daily high on June 25 aligns with the upper end of normal late-June variability at Songshan. The East Asian summer monsoon and subtropical high-pressure systems that dominate the region in this period can push readings above 35°C by mid-July. The data doesn’t care about the politics of how we discuss heat. A 31°C June reading in Taipei is climatologically routine, not alarming.

For prediction market design, this resolution illustrates both the strength and the limitation of the multi-bucket categorical structure. Eleven outcome ranges capture granularity that a simple over/under binary cannot. But that granularity also means the opening price of any single bucket is necessarily low, even when forecasters have strong directional conviction. Traders navigating Taipei temperature markets going forward should expect 31°C and 32°C buckets to carry the most probability mass in late June, based on the historical climatological record from Songshan.

• Taipei Songshan Airport Station will continue to serve as the resolution source for Polymarket weather markets covering the city, making its observational record directly relevant to future market pricing.
• July and August Taipei temperature markets should see probability mass shift toward higher buckets, with 33°C to 36°C outcomes becoming more competitive as the peak summer heat period arrives.
• The 24-hour volume concentration pattern observed here, 75% of trades arriving on the final day, is a structural feature of weather markets where forecast precision increases sharply as the observation window approaches.
• Traders in similar multi-bucket weather markets can use the 20% opening price for 31°C as a baseline signal: when a specific bucket opens at twice the flat distribution probability, the market is already expressing a soft consensus.

LINES RESOLUTION VERDICT

RESOLVED YES: 31°C CONFIRMED

Taipei Songshan Airport Station recorded a 31°C high on June 25, 2026, confirming what an increasingly focused market had priced in through the final 24 hours. In a well-structured multi-outcome weather market, a 20% opening price resolving to 100% reflects good calibration, not a miss.

What the market showed: The 31°C bucket opened at 20% implied probability across an 11-outcome field. It closed at 100% after observational data confirmed the Songshan reading. With $87,607 of the $116,899 total volume flowing in on the final day, trader conviction tracked the tightening forecast window exactly as expected.