Highest temperature in Hong Kong on June 30?

Platform comparison

Market context

The real-world event is the daily maximum temperature recorded by the Hong Kong Observatory on 30 June 2026, which will determine the outcome of a prediction market where the crowd currently assigns only a 10% probability to the highest temperature falling within a specific elevated range. Historical data shows that June is typically hot in Hong Kong, with average highs around 31.7°C (89°F), while July is the hottest month overall[3]. Recent years demonstrate significant variability: June 2025 was notably hotter and drier than usual due to a stronger subtropical ridge, pushing temperatures higher than the seasonal norm[6]. In the first half of June 2026, daily highs have already reached 91.6°F (33.1°C), suggesting the atmosphere is primed for another warm spell[7]. This historical context frames the 10% probability as a cautious bet against a repeat of extreme conditions, despite the recent trend of hotter summers.

Traders should monitor the Hong Kong Observatory’s daily extract for the finalised “Absolute Daily Max” value once published, as the market cannot resolve until this data is confirmed[9]. Key catalysts include announcements regarding the strength of the subtropical ridge over southeastern China, which directly influences temperature peaks, and any unexpected shifts in local cloud cover or rainfall that could suppress highs[6]. The settlement window ends on 30 June 2026 at 12:00 UTC, meaning the final temperature reading must be recorded before this deadline[2]. Recent forecasts for June 2026 indicate daily highs ranging from 30°C to 33°C (86°F to 91°F), with overnight lows between 26.7°C and 27.8°C (80°F to 82°F)[5]. Any deviation from this range, particularly a spike above 33°C, would significantly alter the probability landscape for the elevated temperature range.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Hong Kong on June 30?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.