Highest temperature in Hong Kong on July 6?

Platform comparison

Market context

On 6 July 2026, Hong Kong will face its peak summer heat as the Hong Kong Observatory records the absolute daily maximum temperature in degrees Celsius, a metric that determines the outcome of this prediction market. The current crowd-implied probability of 0% for a “YES” outcome suggests the market expects the temperature to fall outside the specified range, yet historical data indicates July is consistently Hong Kong’s hottest month, with daily highs routinely reaching 32–35°C at the Observatory and peaking higher in the New Territories.

Historical records frame this probability with stark clarity: in 2023, Hong Kong recorded its hottest day of the year at 34.6°C at the Observatory, while in 2018, Sheung Shui hit 39°C, the highest ever recorded in the region[7][8]. Even in typical years, July averages 28–32°C at the Observatory, with frequent spikes above 34°C[2][6]. The 0% implied probability appears to diverge significantly from analyst consensus on summer heat extremes, which consistently project temperatures well within the upper range for mid-July, raising questions about whether the market is mispricing seasonal certainty or reacting to an unverified range definition.

Traders should monitor the Hong Kong Observatory’s “Daily Extract” releases, which finalise the absolute daily max data, and watch for real-time weather bulletins on heatwaves or tropical disturbances that could suppress temperatures[3][4]. Recent reports from the Observatory confirm Hong Kong is set to experience abnormally high temperatures in 2026, with forecasts already indicating highs near 28°C on Tuesday and potential spikes beyond 34°C as the month progresses[5][9]. The settlement window closes at 12:00 UTC on 6 July, so any delay in data publication could postpone resolution, making the timing of the Observatory’s official extract a critical catalyst for traders comparing odds across platforms like Polymarket and Kalshi.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 6? 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 PolyGram, 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

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.

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.

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.