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 dataset. The settlement hinges on the "Absolute Daily Max (deg. C)" figure to one decimal place, with the resolution window closing at 12:00 UTC on that date. Programmatically, traders would need to monitor the Observatory's climate data portal and parse the published figure once it becomes available, typically within 24–48 hours of the observation date.

Historical context shows Hong Kong's July temperatures cluster predictably. The Observatory's records indicate July daily maxima typically range between 32–34°C, with occasional peaks above 35°C during heat waves. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity to establish meaningful odds. Comparable weather markets on this venue have shown that crowd forecasts for Hong Kong summer temperatures tend to underestimate variance; the city experiences significant day-to-day fluctuation driven by monsoon patterns and urban heat effects.

Traders should track the extended forecast from the Observatory and regional meteorological agencies in the weeks preceding 28 July. The Southwest Monsoon dominates this period, and any shift towards a high-pressure system or tropical cyclone activity would materially alter temperature expectations. Conditional order logic could automate position adjustments based on published forecasts from 7–10 days prior, when model confidence typically stabilises. The Hong Kong Observatory publishes 9-day forecasts updated twice daily, providing the primary data dependency for systematic approaches to this market.

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 Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.

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.