Highest temperature in Hong Kong on August 5?

Platform comparison

Market context

Hong Kong’s highest temperature on 5 August will be the Hong Kong Observatory’s **“Absolute Daily Max”** for that date, published later in the Daily Extract and reported to one decimal place. Because the market settles on the temperature band containing that final figure, programmatic traders usually model it as a lookup problem rather than a directional weather bet: the key is mapping the observed maximum to the correct range once the extract is finalised.

The current **0% YES** looks consistent with the market being one day before settlement and with the fact that only the final official reading matters, not forecasts. August climatology in Hong Kong is hot, but the likely outcome distribution still clusters around the low-30s Celsius rather than extreme values; commercial forecast pages for this week put 5 August around **29–31°C** in the city, while the Observatory’s regional readings and recent reporting show Hong Kong has already had a severe heatwave, with the year’s hottest day reaching **34°C at the Observatory** and **36.7°C in Sheung Shui**. [1][3][6]

For trading workflows, the main catalysts are the Observatory’s late-day bulletin updates, any heat advisory or thunderstorm/rain interruptions that can cap the daytime maximum, and the timing of the final Daily Extract publication, since the market cannot resolve until the official record appears. A practical setup is to watch the Observatory’s regional temperature feed during the afternoon, compare it with short-range forecasts, and place conditional orders only if the live max drifts close to a range boundary; the exact settlement source is the Observatory’s published extract rather than an app forecast. [2][6][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on August 5? 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 Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees.

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 Bot 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.

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.

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.