Highest temperature in Hong Kong on June 22?

Platform comparison

Active sub-markets

Market context

Hong Kong is poised for an exceptionally hot June 2026, with the Hong Kong Observatory forecasting above-normal temperatures for the summer season. This climatic backdrop directly challenges the current crowd-implied probability of 0% for a high-temperature outcome on 22 June, creating a stark divergence between prediction-market sentiment and official seasonal guidance. While sportsbook lines on similar weather contracts often reflect conservative historical averages, the official forecast suggests a significant shift toward record-breaking heat, aligning more closely with analyst consensus that anticipates temperatures exceeding 34°C.

Historical precedents frame this probability as unusually low, given that Hong Kong recorded its hottest summer on record in 2023 with a mean of 29.7°C, and 2025 saw the highest absolute maximum for June at 35.6°C. Recent data shows the city hitting 34.6°C in early 2026, the hottest day of the year so far, reinforcing the trend of intensifying heat. Traders should monitor the Hong Kong Observatory’s upcoming "Daily Extract" publications for the finalized "Absolute Daily Max" data, as settlement depends entirely on this official release. The tropical cyclone season, likely starting in June, remains a key dependency that could alter temperature trajectories, warranting close attention to the Observatory’s annual outlook updates.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on June 22? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Best Prediction Markets UK — the application we operate, where you trade directly against 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

Where can I trade this market with the lowest fees?

On Best Prediction Markets 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.

Is this market available outside the US?

Best Prediction Markets 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.

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.

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.