Highest temperature in Hong Kong on June 16?

Platform comparison

Active sub-markets

Market context

On 16 June 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. This market settles on that single official reading, published in the Observatory's Daily Extract once data is finalised. The 0% crowd probability suggests either extreme confidence in a specific range or minimal trading activity; across Polymarket, Kalshi, Betfair and Smarkets, weather markets of this specificity often show thin liquidity until the settlement window narrows, and decimal-odds platforms like Betfair may display wider spreads than probability-implied markets on Polymarket.

Hong Kong's June temperatures cluster reliably between 28–32°C, with historical daily maxima rarely exceeding 34°C or falling below 26°C during the month. The 2025 Hong Kong summer saw 16 June peak at 30.2°C; the five-year average for mid-June hovers near 29–30°C. Traders should note that the Observatory's "Absolute Daily Max" is measured to one decimal place, making narrow ranges (e.g., 30.0–30.9°C) the most frequently resolved bands. Kalshi's KYC requirements and US-focused settlement may exclude some Asia-based traders, whilst Smarkets' lower fees (2%) versus Polymarket's standard structure can shift edge on low-probability outcomes.

Catalysts remain limited: no scheduled typhoons or heat alerts typically precede mid-June in Hong Kong's meteorological calendar. The settlement depends entirely on Observatory publication timing; delays in the Daily Extract release could postpone resolution beyond the 12:00 UTC window, a factor worth monitoring on the Observatory's website closer to the date.

Methodology

This page compares Highest temperature in Hong Kong on June 16? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative, which mirrors the Polymarket order book at 0% fees. 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.

What does it cost to trade on Polymarket Alternative?

Zero. Polymarket Alternative routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.