Highest temperature in Hong Kong on June 25?

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Market context

The Hong Kong Observatory and climate models forecast above-normal temperatures for late June 2026, with daily highs on 25 June expected to reach 32–34°C. This contradicts the current crowd-implied probability of 0% for the market resolving to any specific range, suggesting a significant mispricing given the official seasonal outlook.

Historically, Hong Kong’s June averages sit between 28°C and 32°C, but the warmest period from late May to mid-September routinely sees daily highs averaging 33°C. With the 2026 seasonal forecast explicitly predicting above-normal temperatures and a higher chance of below-normal rainfall, comparable years indicate that 32°C or 33°C are the most probable frontrunners, not an outlier low.

Traders should monitor the final publication of the “Daily Extract” from the Hong Kong Observatory, which will confirm the absolute daily maximum temperature once data is finalized. The market cannot resolve until this official figure is released, and any deviation from the 32–34°C model range could shift frontrunners. As noted in the Observatory’s June–August 2026 forecast, the ENSO status and climate models reinforce the above-normal temperature trend, making the 0% probability increasingly untenable as settlement approaches.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Sport Prediction, which mirrors the Polymarket order book directly.

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 Sport Prediction, 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.

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.

Do I need to KYC for this market?

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