Highest temperature in Hong Kong on July 13?

Platform comparison

Market context

The market bets on whether Hong Kong’s highest temperature on 13 July 2026 will fall into a specific Celsius range, with the crowd currently pricing a YES outcome at 0%. This implies the consensus expects the day’s peak to land outside the offered bracket, likely in a higher range typical of mid-summer heatwaves.

Historically, July is Hong Kong’s hottest month, with average highs near 31.7°C (89°F) and record daily maxima exceeding 35°C in exceptionally hot years like July 2024, when 6 July saw a record daily mean of 30.8°C and a minimum of 29.2°C[1][6]. The 2021 year was the warmest since records began in 1884, with an annual mean of 24.6°C, reinforcing a long-term warming trend that makes extreme July highs more probable[4]. Given this backdrop, the 0% implied probability on the current range appears contrarian; value may sit on the underdog side if the bracket is set conservatively low relative to recent extremes.

Traders should monitor the Hong Kong Observatory’s Daily Extract for the “Absolute Daily Max (deg. C)” once finalized, as settlement hinges entirely on this official figure[7]. With today already being 13 July 2026, the key catalyst is the publication of the finalized data, which typically follows within 24–48 hours after the date. No external announcements are expected, but any deviation from the forecasted 29–34°C range (84–94°F) cited for July 2026 could shift odds rapidly[2][3]. Watch for real-time updates from the Observatory’s climatological services page, where the Daily Extract will appear once data is locked[7][10].

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

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 Who Will Win 2026. 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.

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.

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.