Highest temperature in Hong Kong on August 9?

Platform comparison

Market context

Hong Kong’s 9 August maximum is trading with the crowd effectively pricing **0% for a YES** outcome, which leaves the favourite firmly on the side of a non-qualifying band rather than an extreme heat print. For handicappers, that means the market consensus is that the Observatory’s daily high will sit below the upper thresholds implied by the contract, with value more likely in the *underdog* ranges only if the afternoon spike materially outperforms the current setup. August in Hong Kong is normally hot and humid, and the Observatory’s climatology shows a 9 August normal daily maximum of **31.6°C** at the Hong Kong Observatory station, which is a useful anchor for thinking about where the day usually lands rather than where isolated urban hotspots may feel warmer.[7]

Comparable cases suggest the market should be read through the lens of late-summer volatility, not just the average. The Observatory has already described August as “exceptionally hot” in a recent official update, and local media reported this year’s highest temperature reaching **35.8°C** with some areas at **37°C**, showing that a very warm outcome is entirely plausible when synoptic conditions line up.[4][6] That said, the contract settles on the Hong Kong Observatory’s recorded maximum, not a citywide “feels like” reading, so traders should separate broad heat sentiment from the exact station data. With the current price near zero, the consensus appears to be leaning towards a middle-temperature bucket, while contrarian value sits in the hotter ranges if the day stays dry, sunny, and well mixed.

The main catalysts are the Observatory’s hourly readings, the midday to afternoon temperature trend, and any forecast or warning language that points to stronger solar heating or suppressed cloud cover before the daily extract is finalised.[1][10][11] The daily extract for the settlement date will not be available until the data are published by the Hong Kong Observatory, so late revisions or delayed posting matter more than in markets that settle off an immediately visible live feed.[1] Short-horizon forecasts from major weather services currently point to a hot day in Hong Kong, with highs around **96–100°F** on 9 August, which is roughly **35.6–37.8°C** and leaves upside risk if those forecasts verify, though the Observatory’s station reading is the only figure that counts for resolution.[2][9][12]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, which mirrors the Polymarket order book directly.

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

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 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.