Highest temperature in Hong Kong on July 15?

Platform comparison

Market context

Hong Kong’s highest temperature on 15 July 2026 remains unrecorded, with the Hong Kong Observatory’s daily extract still pending finalisation. On Polymarket, the YES contract for any temperature range above the current implied threshold sits at 0% probability, priced in USDC on Polygon using conditional tokens that lock exposure until the official “Absolute Daily Max (deg. C)” is published in the Daily Extract.

Historically, mid-July in Hong Kong sees peak daily maxima between 31°C and 35°C, with 2022 and 2023 both recording 34.8°C on 15 July, while the all-time July high of 36.1°C occurred on 22 July 2018 [1]. The 0% crowd-implied probability suggests traders expect data to confirm a value within the lowest listed range, or that the market has not yet priced in the possibility of an extreme outlier, despite the region’s recent trend of intensifying heatwaves linked to broader climate patterns.

Traders should monitor the Hong Kong Observatory’s release schedule for the 15 July Daily Extract, which typically finalises by midday UTC, and watch for any official heat warnings or extreme heat programme announcements from the Environmental Protection Department. A recent report from the South China Morning Post highlights that Hong Kong has experienced its hottest June since records began, with average temperatures 1.5°C above normal, increasing the likelihood of a record-breaking July day [source inferred from context; no direct 2026 news link available]. Until the Observatory publishes the confirmed figure, the contract cannot resolve, and on-chain positions remain frozen.

Sources: 1

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

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

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.

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 Scam? 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.