Highest temperature in Hong Kong on August 2?

Platform comparison

Market context

Hong Kong’s daily peak temperature on 2 August will be set by the Hong Kong Observatory’s final “Absolute Daily Max” reading, rounded to one decimal place and published in its daily extract rather than by an intraday forecast. For a programmatic trader, the practical task is to poll the Observatory’s climate extract after the settlement window and map the reported maximum into the market’s discrete temperature bands, while allowing for the fact that the market cannot resolve until the official data has appeared.[2][3]

The current 0% implied probability is best read as a stale or pre-resolution artefact rather than a meaningful view on the weather itself. Comparable Hong Kong August conditions usually sit in the low 30s Celsius, with forecast guidance around 28–31°C and seasonal descriptions often pointing to 27–32°C, so outcomes in the upper 20s and low 30s are the natural cluster if showers or cloud suppress the peak.[1][4][5] Recent reporting also shows the territory has already had multiple 34°C-plus days and locally higher readings in 2026, which matters because it confirms that the top end of the distribution can still be reached when heat builds inland.[6][10][11]

A trader watching this mechanically would focus on the Observatory’s forecast issuance, any thunderstorm or rain warnings, and the timing of the final daily extract, since those are the dependencies that move the realised maximum and therefore the correct bracket. Polymarket’s own market page notes that later revisions to already published temperatures are excluded from resolution, so the key operational check is the first final publication, not subsequent corrections.[2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on August 2? 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot 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.