Highest temperature in Hong Kong on July 12?

Platform comparison

Market context

Hong Kong is bracing for its peak summer heat as the city approaches 12 July 2026, the date determining the highest temperature recorded by the Hong Kong Observatory. With the crowd-implied probability for a YES outcome sitting at 0%, the market treats any extreme spike as virtually impossible, yet July remains the hottest month on record, having broken eleven heat-related benchmarks in 2022 alone[1][2]. Historical data shows July 2022 was the hottest month since records began in 1884, establishing a precedent where daily highs frequently exceed 33°C, making the current zero-percent pricing appear to ignore the seasonal baseline where temperatures routinely climb into the 31–34°C range[1][7].

Traders should monitor the Hong Kong Observatory’s daily extract for the “Absolute Daily Max” figure, which will finalize the settlement once published after the event[8]. The forecast for July 2026 suggests daily highs ranging from 30°C to 34°C (86°F to 94°F), with the average high for the month sitting at 31.7°C[3][7]. While no specific heatwave announcement has been made yet, the dependency on the official Daily Extract means the market remains blind until the data is finalized, creating a potential value spot for contrarian traders who believe the 0% implied probability misprices the inherent volatility of mid-summer weather in a tropical climate[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 Who Will Win 2026, which mirrors the Polymarket order book directly.

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 Who Will Win 2026. 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 Who Will Win 2026 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.