Highest temperature in Hong Kong on June 7?

Platform comparison

Active sub-markets

Market context

On 7 June 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. This market settles on that single absolute maximum, published in the Observatory's Daily Extract once the meteorological day closes. The settlement window closes at midday UTC on that date, meaning traders must assess the likelihood of specific temperature bands before the Observatory's official reading is finalised and released.

Hong Kong's June climate sits at the threshold of the summer monsoon season. Historical data from the Observatory shows June daily maxima typically range between 29°C and 33°C, with occasional excursions above 34°C during heat waves. The current 0% crowd probability across major platforms suggests either extreme confidence in a narrow range or sparse liquidity. Polymarket's fee structure (2% maker and taker) and Kalshi's tiered approach (0.2% to 2% depending on volume) will affect margin calculations differently for traders building positions in lower-probability temperature bands. Betfair and Smarkets, operating on decimal odds rather than implied probability displays, may attract different trader cohorts unfamiliar with percentage-based framing, potentially creating pricing discrepancies on tail outcomes.

Traders should monitor the China Meteorological Administration's seasonal forecasts and any tropical cyclone activity in the South China Sea during early June 2026, both of which influence Hong Kong's temperature profile. The Observatory publishes 10-day outlooks weekly; these updates become critical decision points as the settlement date approaches. Unlike equity or commodity markets, weather data carries no revision risk once published—the Observatory's reading is final and non-negotiable.

Methodology

This page compares Highest temperature in Hong Kong on June 7? 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 Kalshi Alternative UK, 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

Is this market available outside the US?

Kalshi Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Kalshi Alternative UK?

Zero. Kalshi Alternative UK 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.

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.