Highest temperature in Taipei on July 31?

Platform comparison

Market context

Taipei’s highest temperature on 31 July will be set by the reading at Songshan Airport, and the live weather backdrop points to a hot afternoon rather than a coolout. Focus Taiwan reported that Taipei was already on an orange heat advisory on Friday, with daytime temperatures above 36°C for a third straight day, which supports the case for a high-end outcome if sunshine persists into the afternoon[1]. That sits against the market’s 0% YES crowd-implied probability, which looks detached from both the seasonal norm and the current heat pattern.

For context, July in Taipei is typically the hottest month, with average highs around 33°C to 34°C and published climate guides regularly showing highs in the low-to-mid 30s Celsius[6][9][17]. Historical references also show that Taipei can exceed 36°C in late July, and the city’s all-time heat record is 39.7°C, underlining that a reading in the upper 30s is not exceptional in extreme setups[11][13]. Compared with that, a 0% implied chance appears much lower than the weather base rate would suggest, especially if one treats the contract as a specific station-day maximum rather than a city-wide average.

The main catalysts are the afternoon weather evolution, any CWA updates, and whether cloud, rain bands, or sea-breeze effects suppress the peak before the settlement cutoff. The latest forecast snippets are mixed: some sources show a hot, mostly sunny end to the month, while others flag moderate rain for 31 July[18], so the key trading question is whether Taipei Songshan stays dry long enough to print its daily maximum before 12:00 UTC. Analysts watching similar weather contracts would usually treat local station forecasts, not city averages, as the decisive input, and that is where the biggest divergence from the market’s current price is most visible.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Taipei on July 31? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees.

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 Best Prediction Markets UK. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK 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.