Highest temperature in Hong Kong on July 8?

Platform comparison

Market context

The real-world event at stake is the peak heat recorded by the Hong Kong Observatory on 8 July 2026, measured in degrees Celsius to one decimal place. This single data point will determine which temperature range resolves the market, with the official figure published only once the Daily Extract is finalized.

Historically, Hong Kong’s early July highs average 30.4°C (86.7°F), with the Observatory’s seasonal forecast for July–September 2026 predicting normal to above-normal temperatures due to El Niño conditions [2][4]. Recent forecasts place the daily maximum for 8 July squarely in the 30–32°C range, making a sub-30°C result unlikely but not impossible [5]. The current crowd-implied probability of 0% YES suggests traders are confident the temperature will exceed the lowest threshold, aligning with the above-normal trend cited by Observatory director Chan Pak-wai [3].

A programmatically focused trader should monitor the Observatory’s Daily Extract release schedule and any updates on cloud cover or rain patches, which directly influence peak temperatures [5][6]. The key dependency is the finalisation of the “Absolute Daily Max (deg. C)” entry, which will only be available after the settlement window closes. Traders should also watch for typhoon announcements, as the forecast of 4–7 cyclones in 2026 could disrupt heat patterns if one approaches before 8 July [3]. No immediate catalysts are expected before the data release, so automated bots should prioritise scraping the official climate page once the extract is published.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 8? 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 Bot UK, which mirrors the Polymarket order book at 0% fees.

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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.