Highest temperature in Hong Kong on July 2?

Platform comparison

Market context

The real-world event hinges on the Hong Kong Observatory’s official daily maximum temperature recorded on 2 July 2026, measured to one decimal in Celsius. Current crowd-implied probability sits at 0% for a YES outcome, yet Polymarket data shows 32°C as the frontrunner at 45%, with 33°C trailing at 28%[1]. Historical context frames this sharply: the Observatory’s seasonal outlook for June–August 2026 forecasts above-normal temperatures amid long-term warming, with typical early-July highs near 31°C under prevailing southwesterly flow[2]. July–September 2026 is expected to be normal to above-normal, reinforcing that 32–33°C is the consensus cluster, not an outlier[3]. The 0% implied probability appears misaligned with climatology, suggesting value may lie contrarianly in betting against the crowd’s extreme doubt.

Traders must monitor the Observatory’s finalised “Daily Extract” for 2 July, which releases only after data is published and cannot resolve until then[1]. Key catalysts include the latest ENSO status and climate model updates, which the Observatory cites as drivers for the above-normal temperature forecast[3]. Recent tourist weather data shows a maximum of 34°C on 30 June, indicating the heatwave is already active and could persist into 2 July[8]. AccuWeather forecasts July 2026 highs between 86°–96°F (30–36°C), aligning with the 32–33°C consensus[4]. The value spot sits where the market’s 0% doubt ignores the robust seasonal signal; the underdog is the crowd’s certainty in a false negative, while the favourite is the temperature range 32–33°C.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on July 2? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

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.