Lowest temperature in Hong Kong on August 8?

Platform comparison

Market context

Hong Kong’s overnight low on 8 August is the event to watch, and the crowd is pricing **0% YES**, which makes the market look heavily skewed towards the favourite outcome of a normal, warm summer minimum rather than an outlier cool reading. Hong Kong’s August normals put the mean minimum at **26.9°C** on 8 August, so the consensus sits around the high-20s rather than anything materially cooler.[1] That is a useful handicapper’s anchor: in a city where August lows typically remain sticky, a sub-25°C print would be a clear contrarian shock, while the most likely buckets are the warm-temperature ranges clustered around the climatological norm.[1][3]

Comparable August data also point to limited downside in the minimum. Hong Kong August averages are generally in the **26–28°C** low range, with record-low August temperatures far below the everyday baseline but still relatively rare as daily minima.[3][5] In practical market terms, that makes the favourite the broad “normal summer low” band, while any value on cooler bands depends on unusual cloud, rain, or a nocturnal wind shift rather than the base climate. The 0% implied price suggests the market may be underweighting the small but real tail risk of a cooler-than-usual dawn, though not enough to overturn the dominant warm-weather framing.[1][3]

The main catalysts are the Hong Kong Observatory’s overnight and pre-dawn readings, plus any late rain or cloud from local convection that can stop the city from holding heat through the night. At 3 a.m. local time, Observatory readings were still around **29°C** with humidity at **84%**, which is consistent with a warm floor unless a more organised weather change develops before sunrise.[14] Traders should watch the Observatory’s hourly updates and the eventual “Daily Extract”, because this market only settles once the **Absolute Daily Min** for the date is published.[6][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, 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.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.