Highest temperature in Taipei on August 20?

Platform comparison

Market context

The market is pricing the likelihood that Taipei's highest temperature on 20 August 2026 will fall within a specific range, with settlement determined by the Daily Observations table at Taipei Songshan Airport Station rather than summary figures. The crowd currently implies 0% probability for the YES outcome, suggesting either extreme confidence in an alternative range or insufficient liquidity driving the price to an outlier position.

Taipei's August temperatures are remarkably consistent. Historical data shows daily highs clustering between 32–35°C during mid-August, with extreme readings above 36°C occurring in roughly 15–20% of years during this period. The 2023 and 2024 August records from Songshan Airport show typical peaks in the 33–34°C band, whilst notably hot years have breached 36°C. The current 0% probability suggests the market has settled on a narrow range expectation, leaving potential value in tail outcomes if the range in question captures temperatures above the historical median.

Traders should monitor tropical cyclone forecasts and monsoon patterns through July and early August 2026, as these significantly influence Taipei's late-summer temperatures. The Western Pacific typhoon season peaks in August, and any system tracking near Taiwan could suppress daytime highs or, conversely, create anomalously warm conditions depending on timing and intensity. The Central Weather Administration's seasonal outlooks, typically released in June, will provide early signals on whether 2026 is tracking toward a warmer or cooler-than-average August. Resolution hinges entirely on Wunderground's Daily Observations table, making data source consistency the critical technical factor.

Methodology

We track Highest temperature in Taipei on August 20? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.