Highest temperature in Hong Kong on August 6?

Platform comparison

Market context

Polymarket has this Hong Kong temperature contract priced at 0% YES, which means traders on Polygon are assigning no weight to any listed outcome at the moment, even though the contract pays out in USDC via conditional tokens if the Hong Kong Observatory’s final daily extract lands in the chosen range. The key point for users is that the market resolves off the Observatory’s “Absolute Daily Max” for 6 August, not a forecast or citywide feel; that makes the settlement a narrow, data-driven event with one official source and a one-day window.

For context, August in Hong Kong is normally hot and humid rather than mild. The Observatory’s 1991–2020 normals show a mean maximum of 31.6°C for 6 August, while historical summer reporting has repeatedly produced readings in the mid-30s, including a 34.6°C Observatory high cited by South China Morning Post during a recent hottest-day spell.[2][18] That backdrop matters because the market’s current 0% implied probability may reflect thin participation rather than a strong view that an extreme outcome is impossible.

The main catalysts are the Observatory’s daytime readings, any late-afternoon swing in cloud cover or rainfall, and the publication schedule for the daily extract, since the market cannot resolve until the final data are posted.[4] Traders also need to watch how competing forecast services evolve through the day, but settlement still depends only on the Hong Kong Observatory’s final figure. AccuWeather’s Hong Kong outlook around 6 August shows high-80s Fahrenheit readings with rain chances, which is consistent with a warm but unsettled day rather than a clean read-through to the final max.[3]

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 Alternative UK, 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

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 Alternative 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.

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 Alternative 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.