Highest temperature in Hong Kong on July 28?

Platform comparison

Market context

Hong Kong's daily maximum temperature on 28 July 2026 will be recorded by the Hong Kong Observatory and published in their Daily Extract climate data. The settlement hinges on the official "Absolute Daily Max" figure in degrees Celsius to one decimal place, with the market window closing at 12:00 UTC on that date. Current crowd-implied probability sits at 0%, suggesting either extreme confidence in a specific temperature range or insufficient liquidity across outcome buckets.

July represents Hong Kong's hottest month climatologically, with historical daily maxima typically ranging between 32–34°C, though readings above 35°C occur in roughly one year in five during this period. The Observatory's 30-year climate normal for late July sits near 32.6°C. Comparable markets on other Asian weather stations show meaningful divergence between sportsbook-style fixed-odds offerings and prediction-market probabilities, particularly when outcomes cluster around seasonal norms rather than extremes. The 0% reading here likely reflects either a single dominant outcome capturing most probability mass or thin order books at the tails.

Traders should monitor the El Niño/La Niña status through June and early July, as the tropical Pacific state influences Hong Kong's monsoon intensity and heat patterns. The Hong Kong Observatory publishes monthly climate summaries and seasonal outlooks; their latest assessment will clarify whether conditions favour above or below-normal temperatures for late July. Urban heat-island effects and any documented changes to measurement protocols at the Observatory's Cheung Chau station should also be cross-checked against historical baselines before settlement.

Methodology

This page reviews Highest temperature in Hong Kong on July 28? 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 Best Prediction Markets, 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 Best Prediction Markets. 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'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.