Highest temperature in Hong Kong on July 6?

Platform comparison

Market context

On 6 July 2026, Hong Kong will experience its peak daily heat, with the Hong Kong Observatory recording the absolute maximum temperature in degrees Celsius. The current crowd-implied probability sits at 0% for a “YES” outcome, suggesting the market believes the temperature will not reach the specified threshold. This stark consensus contrasts sharply with historical patterns, where July is Hong Kong’s hottest month, averaging highs near 32°C (89°F)[3]. Over the past 140 years, July has frequently produced temperatures exceeding 31°C, with the highest monthly maximum recorded at 35.7°C in recent decades[4]. Even in 2025, Hong Kong broke 20 weather records, including its sixth hottest year overall, with all 12 months warmer than usual[7]. Given this backdrop, the 0% probability appears to be an underdog stance, potentially mispricing the likelihood of extreme heat.

Traders should monitor the Hong Kong Observatory’s daily extract for finalized data, as the market cannot resolve until the “Absolute Daily Max” is published[9]. Recent forecasts for July 2026 indicate daily highs ranging from 30°C to 35°C (86°–95°F), with overnight lows between 26°C and 28°C (79°–82°F)[5]. A key catalyst is the potential for tropical systems or monsoon surges, which could elevate temperatures further. The Observatory’s 30-year climate data confirms that July consistently delivers peak heat, making contrarian bets on higher temperatures a value spot[1]. While the market currently dismisses the possibility of extreme heat, the historical and forecast evidence suggests the consensus may be overly cautious, leaving room for value on the favourite side.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on July 6? 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

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. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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