Pronóstico: Highest temperature in Hong Kong on July 31?

Platform comparison

Market context

Polymarket is pricing this Hong Kong heat contract at **0% YES**, so the market is effectively saying the day’s official peak will not land in the specified range. Because the market settles on the Hong Kong Observatory’s final “Absolute Daily Max” for 31 July, the relevant asset is not the weather itself but the USDC-backed conditional token position on Polygon that pays out only if the published figure falls inside the chosen band.

That reading sits against a climate where late-July highs in Hong Kong commonly sit in the low-to-mid 30s Celsius, with the Observatory’s July records showing a monthly maximum of 35.7°C and recent Julys producing extremes above 36°C. The HKO also recorded 36.1°C on 27 July 2023, underlining that spikes well above seasonal norms are not rare enough to dismiss in a one-day market, even if a 0% quote signals traders think this specific band is out of reach.[2][8]

For traders, the key catalyst is the Observatory’s own publication process: the market cannot resolve until the relevant Daily Extract is finalised and posted on the HKO climatology page. Intraday readings can shift quickly in Hong Kong’s summer humidity, but what matters here is the official daily maximum at the observatory station, not district highs or media headlines; the contract only becomes actionable once that figure is published and mapped to the market’s temperature range.[1][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Qué Es, which mirrors the Polymarket order book directly.

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 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.

Do I need to KYC for this market?

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