Highest temperature in Taipei on August 20?

Platform comparison

Market context

The market concerns the highest temperature recorded at Taipei Songshan Airport on 20 August 2026, measured in degrees Celsius via Weather Underground's Daily Observations table. The settlement window closes at 12:00 UTC on that date, creating a hard deadline for temperature data collection from the primary resolution source.

August represents peak summer in Taipei, with historical daily highs typically ranging between 32–35°C. The 0% crowd-implied probability suggests traders are pricing in either an exceptionally cool day or systematic uncertainty about the resolution mechanics. Comparable August days at Songshan Airport rarely fall below 30°C; the station's 30-year August average high stands near 33°C. The specificity of using Daily Observations rather than the Day High & Low summary introduces resolution risk that may explain the cautious positioning, as discrepancies between the two datasets occasionally occur during equipment maintenance or data processing delays.

Traders should monitor Taiwan's monsoon patterns and tropical weather systems in mid-August 2026, particularly any typhoon activity that could suppress temperatures. The Central Weather Administration's seasonal forecasts, typically issued in July, will provide guidance on atmospheric conditions. Songshan Airport's location in central Taipei means urban heat-island effects and local air-quality episodes can influence recorded temperatures. Cross-platform comparison shows minimal activity on competing sportsbooks for this specific contract, leaving the prediction market as the primary price discovery mechanism. Any significant divergence between this market and Weather Underground's historical August distribution would indicate either mispricing or genuine uncertainty about data sourcing.

Methodology

This page reviews Highest temperature in Taipei on August 20? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.