Highest temperature in Taipei on July 31?

Platform comparison

Market context

Polymarket is pricing this Taipei Songshan Airport temperature contract at **0% YES** in USDC on Polygon, which means the current on-chain view is that the day’s recorded high will not land in the contract’s YES range. The market resolves to the temperature bucket containing the highest reading logged at Taipei Songshan Airport Station on 31 July 2026, using Wunderground’s daily history page as the source of truth, so the only number that matters is the station’s maximum for the full day, not a forecast headline or city-wide average.

For context, Taipei’s July climate is normally hot enough that a high in the low to mid-30s Celsius is routine, and published climate guides put average July highs around 33°C, with occasional peaks in the high 30s.[4][16][18] That makes a zero-per-cent price unusual only if traders believe the market is misreading the settlement bucket, because recent comparable heat already shows the city can push well above seasonal norms. Focus Taiwan reported Taipei temperatures above 36°C for a third straight day on Friday, alongside an orange heat advisory from the Central Weather Administration, which is the sort of setup that keeps the upper end of the distribution live.[1]

The main catalysts now are the actual afternoon and early evening readings at Songshan, plus any late cloud cover or marine influence that can cap the station’s maximum before the Wunderground page locks in the day’s high. In practical terms, traders are watching whether the airport station prints one more surge above the day’s running high, because conditional tokens on Polygon settle strictly against the recorded bucket rather than against modelled weather or broader Taipei forecasts. The only dependency that matters for resolution is the station log itself, so a trader’s checklist is the published history page, the day’s heat advisory, and whether the final maximum clears the relevant range before the settlement window closes.

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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.