Highest temperature in Hong Kong on July 27?

Platform comparison

Market context

Polymarket is pricing this Hong Kong temperature contract at **0%** across the board right now, which on-chain means traders are effectively assigning no value to any specific Celsius band ahead of the Hong Kong Observatory’s final daily extract. Because the market settles in **USDC** on **Polygon** through conditional tokens, the position that matters is the exact range containing the Observatory’s recorded **absolute daily maximum** for 27 July, not an informal forecast of “hot” or “cool”.

For context, Hong Kong’s July climate usually sits near the top end of the summer range: average highs are around **32°C**, with humidity, heavy rain and thunderstorms common enough to distort how the day feels even when the official maximum is still elevated. That makes the upper mid-20s to low-30s bands the natural reference point for traders, while truly low outcomes depend on a notably cooler day than normal. A 0% market price suggests the order book is thin or that traders have not yet committed capital, rather than proving the event is impossible.

The main catalyst is the Hong Kong Observatory’s publication schedule for the **Daily Extract** and the eventual posting of the finalized **“Absolute Daily Max (deg. C)”** figure, which the market rules explicitly require before settlement. Until that data appears, the contract stays open and reprices only if traders react to local forecast shifts, rainfall timing, or any late-day heat spikes. With settlement not due until the official result is published, the practical watchpoints are the Observatory update, the day’s synoptic conditions, and any revision to the forecast immediately before the cut-off.

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Methodology

This page reviews Highest temperature in Hong Kong on July 27? 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 Scam?, which mirrors the Polymarket order book at 0% fees.

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

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 Scam?. 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'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.

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 Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.