Highest temperature in Hong Kong on June 5?

Market context

On 5 June 2026, the Hong Kong Observatory will record the highest temperature reached that day in degrees Celsius. This market asks traders to predict which temperature range will contain that single daily maximum reading. In prediction markets, a YES share pays out if the event occurs as specified; a NO share pays out if it does not. Here, traders are essentially betting on which temperature bracket—say, 32–33°C or 33–34°C—will match the Observatory's official measurement to one decimal place.

Hong Kong's June climate is characterised by early summer heat and increasing humidity ahead of the monsoon season. Historical data from the Observatory shows June daily maxima typically range between 29°C and 34°C, with an average around 31–32°C. The current crowd probability of 0% for any single outcome suggests either that the market has not yet attracted sufficient trader participation or that the specific temperature ranges offered are perceived as unlikely by early participants. Comparable weather prediction markets often see probabilities shift substantially once meteorological forecasts become available in the days immediately before the settlement date.

Traders monitoring this market should watch the Hong Kong Observatory's extended forecasts from late May onwards, as these will provide increasingly precise estimates of atmospheric conditions for early June. Seasonal patterns—including the onset of the southwest monsoon and any tropical systems developing in the Western Pacific—will be material factors. The Observatory publishes daily weather updates and monthly climate summaries that traders can cross-reference to calibrate their expectations against historical variability.

Methodology

This page reviews Highest temperature in Hong Kong on June 5? 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 PolyGram. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.