Highest temperature in Hong Kong on August 10?

Platform comparison

Market context

Hong Kong’s Observatory is tracking an early-August heat episode, and the key question for this market is whether the day’s **Absolute Daily Max** ends up in the upper-30s or settles a touch lower once the official daily extract is finalised. On comparable hot August days, Hong Kong often produces maxima around the low-30s in ordinary conditions, but recent extremes show how quickly the city can break out of that range when warm air dominates. The Observatory reported **34.4°C** on 10 August 2025, the highest reading of that month, while the city also logged **36.9°C** on 9 August 2026, described as a record high for the station.[2][10][12]

For traders, the main catalyst is the official Hong Kong Observatory publication, not social-media buzz or private forecasts, because this market only resolves once the Daily Extract is posted and the 10 August maximum is final.[1][17] The live setup matters because the Observatory’s own records show very warm starting conditions and the press weather bulletin already had **29°C** at 6 a.m. local time, leaving plenty of runway for further heating if cloud cover thins.[9] Private forecasts from AccuWeather and Timeanddate both point to a very hot day near the upper-90s Fahrenheit, with “dangerous heat” language and a forecast high around **95–97°F** (about **35–36°C**), which keeps the outcome clustered around the highest band rather than the low-30s.[5][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Hong Kong on August 10? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

UK Frequently Asked Questions

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.