Pronóstico: Highest temperature in Hong Kong on July 3?

Platform comparison

Market context

The Hong Kong Observatory’s absolute daily maximum temperature on 3 July 2026 is the real-world event this market tracks, with the current crowd-implied probability of 0% for a “YES” outcome suggesting the market believes no temperature range will be selected—a contradiction that likely stems from a misread of the contract’s resolution mechanics rather than a forecast of impossible weather. In reality, July highs in Hong Kong typically average 31–32°C, and the Polymarket contract for the highest temperature on this date currently leads with 31°C at 48% implied probability, followed by 30°C at 36%, reflecting strong model consensus and climatology for early July under prevailing southwesterly monsoon flow[2].

Historical patterns and comparable cases frame how to interpret the current 0% probability: the market for the lowest temperature on the same date shows 27°C as the frontrunner at 47%, with nearby outcomes of 26°C and 28°C each near 20%, indicating that traders are actively pricing in realistic temperature bands rather than dismissing the event entirely[1]. The Hong Kong Observatory’s seasonal forecast for July–September 2026 expects temperatures to be normal to above-normal, with a slightly higher chance of normal to above-normal rainfall, further supporting the likelihood of measurable highs in the 30–32°C range[3].

Traders should watch the Hong Kong Observatory’s “Daily Extract” publication schedule, as the market cannot resolve until the “Absolute Daily Max (deg. C)” for 3 July is finalized and published in the official dataset[5]. Recent forecasts from the Observatory already indicate a maximum of 31°C and a minimum of 27°C for 3 July, with 80% relative humidity and a very high UV index of 8, providing a concrete benchmark for conditional token pricing on Polygon using USDC[5]. Any delay in the Daily Extract release or discrepancies between forecasted and observed values could shift conditional token liquidity, especially as the settlement window ends on 2026-07-03T12:00:00Z.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Hong Kong on July 3? 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 Qué Es, which mirrors the Polymarket order book at 0% fees.

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 Qué Es. 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.

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