Pronóstico: Highest temperature in Hong Kong on August 2?

Platform comparison

Market context

Polymarket prices this contract with **27°C** leading at **34%** and **28°C** close behind at **32%**, so the on-chain market on Polygon is currently treating a mid-to-high 20s reading as the most likely settlement outcome. Shares are bought and sold in **USDC**, and the winning conditional token pays out **$1** if the Hong Kong Observatory’s final “Absolute Daily Max (deg. C)” for 2 August falls into that range.

That pricing fits Hong Kong’s August profile, where daytime highs are often in the high 20s to low 30s, but the exact outcome still depends on cloud cover, rain bands, and whether any heat build-up carries through into the afternoon. Recent local reporting has also shown how quickly the city can swing into hotter territory: the Hong Kong Observatory’s maximum reached **34.3°C** on a recent summer day, underlining that the upper bands in this market are not remote even if they are less favoured by the crowd.[15]

For traders, the key catalysts are the Observatory’s hourly readings, short-range forecast updates, and any abrupt weather changes affecting the afternoon peak, because this market only resolves once the final daily extract is published on the Observatory site.[3] The contract itself remains open until the settlement window closes at **12:00 UTC**, so the practical question is whether the day’s peak lands just above the current favourites or whether a hotter-than-expected spell pushes the final max into the upper 20s or low 30s.[1][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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'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.

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.