Highest temperature in Hong Kong on June 10?

Platform comparison

Active sub-markets

Market context

On 10 June 2026, the Hong Kong Observatory will record the day's maximum temperature in degrees Celsius. This market settles on that single figure, rounded to one decimal place, with traders selecting which temperature band will contain the actual high. The 0% crowd probability suggests either extreme confidence in a particular range or sparse liquidity; on Kalshi, where this market likely trades, such skew often reflects thin order books rather than genuine certainty. Polymarket and Betfair would display this differently—Polymarket in decimal odds, Kalshi in implied probability—but the underlying settlement mechanism remains identical across platforms.

Hong Kong's June climate is consistently warm and humid, with historical daily maxima typically between 29°C and 33°C. The Hong Kong Observatory's 30-year average for early June peaks near 31°C, though extremes have ranged from 27°C in cooler years to 35°C during heat waves. Traders should examine the specific temperature bands offered; a market showing 0% YES across all ranges signals either a display error or that no single bracket has attracted meaningful backing yet. Cross-platform comparison reveals Kalshi's stricter KYC requirements may limit participation relative to Betfair's broader reach, potentially affecting price discovery.

The settlement depends entirely on the Hong Kong Observatory's published daily extract, available weeks after the date itself. Traders should monitor June 2026 weather forecasts from late May onwards and track any Observatory methodology changes. No announcements typically precede routine temperature publication, making this a pure weather-outcome market with no scheduled catalysts beyond seasonal patterns.

Methodology

This page compares Highest temperature in Hong Kong on June 10? 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

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, 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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi Alternative UK triggers a quick verification flow that finishes in minutes.