Highest temperature in Taipei on July 27?

Platform comparison

Market context

Polymarket currently prices this contract with **35°C** leading at **31%**, while **36°C** sits at **23%**, so the market is leaning towards a hot but not extreme peak for Taipei Songshan Airport Station today. On Polymarket, those prices are just the crowd’s implied probabilities, settled in **USDC** on **Polygon**, with the correct outcome redeemable through the market’s **conditional tokens** when the exchange resolves the day’s high temperature against the Wunderground history page.[1]

For context, Taipei in July is normally hot, humid and rain-prone, with typical highs around the low 30s Celsius rather than the mid-30s.[2] That makes a 35°C print plausible but still meaningfully above the usual July pattern, which helps explain why the distribution is concentrated around 34°C to 36°C rather than the upper bins. The market’s 0% crowd-implied YES on a specific outcome should be read in that framework: it is not a view on “will it be hot”, but on *which exact bucket* the station’s recorded maximum lands in.[1][3]

Traders should watch the day’s actual weather evolution rather than headlines or scheduled releases. The settlement source is the Wunderground daily history for Taipei Songshan Airport Station, so the main catalysts are late-morning heating, cloud cover, afternoon sea-breeze effects, and any convective rain that caps the high before the window closes.[1][2] In practical terms, once the day’s maximum is set at the station, the outcome is largely locked in; the on-chain position then only reflects whether your conditional tokens map to the recorded Celsius range.[1]

Sources: 1 · 2 · 3

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Polymarket Alternative UK. 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'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.