Highest temperature in Taipei on July 23?

Platform comparison

Market context

Polymarket is pricing this Taipei airport temperature contract as a near-certainty for a **34°C** high, with the crowd putting that outcome at **77%**, while **35°C** sits at **18%** and the rest of the curve is thin. On Polymarket’s mechanics, that view is expressed in USDC on Polygon through conditional tokens, so the price reflects where traders think the Wunderground reading for Taipei Songshan Airport Station will land within the market’s temperature bands by settlement.

For context, late-July Taipei is typically hot and humid, and July is widely described as the city’s hottest month, with daytime highs often around the low-to-mid 30s Celsius. Travel guidance for Taipei in July puts usual daytime temperatures roughly in the **32–38°C** range, which makes a 34°C print a very standard mid-summer outcome rather than an extreme. Against that backdrop, a 0% YES crowd read suggests the book is expecting a normal summer high rather than a sharp heat spike.

The main catalysts are straightforward: the day’s actual airport observations, any late afternoon surge in heat before the settlement cutoff, and whether cloud cover or rain suppresses the peak. Taipei’s summer weather can shift quickly with monsoon rainfall and typhoon-related systems, so traders usually watch local forecast updates and airport conditions rather than city averages. Because settlement uses the airport station’s highest recorded temperature on Wunderground, the relevant dependency is the station feed itself, not broader Taipei headlines or nearby neighbourhood temperatures.

Sources: 1 · 2 · 3 · 4 · 5

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

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

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.