Highest temperature in Hong Kong on July 2?

Platform comparison

Market context

The Hong Kong Observatory will record the absolute daily maximum temperature in degrees Celsius for 2 July 2026, with the market resolving to the specific range containing that figure. Today, Polymarket prices this contract with a 0% probability for the YES outcome, implying the crowd believes the temperature will fall outside the defined range. This on-chain pricing, settled in USDC on the Polygon network via conditional tokens, reflects a stark divergence from the underlying meteorological reality where July is historically Hong Kong’s hottest month.

Historical data and seasonal forecasts frame this near-zero probability as potentially mispriced. The Hong Kong Observatory’s seasonal forecast for July–September 2026 predicts normal to above-normal temperatures, while July averages typically reach 31°C to 32°C with extreme heat and humidity[2][6]. AccuWeather’s monthly outlook for July 2026 shows daily highs ranging from 86°F to 96°F (30°C to 35.5°C), with an average high of 89°F (31.7°C)[3]. If the market’s range excludes these common July peaks, the 0% price may ignore the statistical likelihood of a record-breaking day, a pattern seen in past years where temperatures exceeded 34°C.

Traders must monitor the Hong Kong Observatory’s upcoming "Daily Extract" publication, which finalises the "Absolute Daily Max" data for 2 July[2]. The immediate catalyst is the short-term forecast indicating mainly cloudy conditions with light rain patches through 9 July, which could suppress temperatures if sustained[4]. However, the broader ENSO status and climate models suggest a higher chance of above-normal heat, making the rain forecast a critical dependency to watch[2]. Any announcement of a tropical disturbance or sudden shift in the multi-model consensus forecast from the Pearl River Delta region could rapidly alter the settlement outcome[9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 2? 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 Legit?, 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

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.

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.