Highest temperature in Hong Kong on July 28?

Platform comparison

Market context

Hong Kong's maximum temperature on 28 July 2026 will be determined by the Hong Kong Observatory's official daily reading, with settlement contingent on publication of that data in their Daily Extract records. The market currently shows zero probability assigned to any temperature range, suggesting either insufficient trader participation or genuine uncertainty about which bracket will ultimately contain the day's high.

July represents Hong Kong's hottest month climatologically, with daily maxima typically ranging between 32–34°C. Historical records from the Observatory show that extreme heat days—those exceeding 35°C—occur roughly 10–15 times annually across the summer months, though concentration varies considerably year to year. The 2023 summer saw multiple days above 35°C, whilst 2022 experienced fewer such occurrences. This variability reflects the interplay between the Pacific anticyclone's positioning and monsoon moisture patterns that characterise the season.

Traders monitoring this market should track the Asian summer monsoon's intensity in the weeks preceding late July, as this directly influences whether tropical moisture suppresses temperatures or whether high-pressure systems dominate. The Hong Kong Observatory publishes extended forecasts approximately 10 days ahead, which will provide the first concrete indication of synoptic patterns for that specific date. Additionally, any unusual atmospheric circulation anomalies reported in regional weather bulletins—particularly shifts in the subtropical ridge—warrant attention, as these can shift daily maxima by several degrees either direction from seasonal norms.

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 Prediction Today, 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.

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.

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.