Highest temperature in Taipei on July 31?

Platform comparison

Market context

Polymarket is pricing this Taipei heat contract at **0% YES** right now, so the market is effectively saying the forecast set-up points to a temperature outcome outside the upper buckets being traded. The underlying event is the day’s highest reading at Taipei Songshan Airport, and the contract settles in USDC on Polygon through conditional tokens once the Wunderground history page is checked for 31 July 2026. The relevant question is not whether Taipei is hot in general, but where the *day’s peak* lands within the market’s listed temperature ranges.

That 0% print looks conservative against both seasonal norms and recent Taipei extremes. July is typically the city’s hottest month, with average highs around the low 30s Celsius, while published climate guides and weather histories show that Taipei can still spike well above 35°C in midsummer, with local record highs near 39–40°C in the city and around 38°C in July on some datasets.[2][4][11][12][13] For a prediction-market trader, that matters because a low implied probability can still be consistent with a plain hot-summer distribution if the market’s “YES” band is narrow or defined around a specific upper threshold.

The main live catalysts are the Central Weather Administration’s heat advisories, cloud cover, and any late-day convection that caps the station maximum before the settlement cut-off on Wunderground. Focus Taiwan reported Taipei above 36°C for a third straight day on Friday, with an orange heat advisory in force and only limited relief elsewhere in Taiwan, which is the kind of regime that can keep the day’s high elevated if sunshine holds through early afternoon.[1] For a Polymarket user, the practical watchlist is simple: CWA updates, the Taipei Songshan Airport Station hourly trend, and whether afternoon cloud build-up arrives early enough to stop the maximum from reaching the market’s trigger band.

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.