Lowest temperature in Hong Kong on August 5?

Platform comparison

Market context

Hong Kong’s overnight minimum on 5 August will be set by the Hong Kong Observatory’s final “Absolute Daily Min (deg. C)” reading, not by any intraday swing or later revision. The market is currently leaning heavily towards a warm tropical overnight, with the crowd pricing the 27°C outcome as the frontrunner and assigning very little weight to cooler bins, which fits the Observatory-linked forecast language around 26–27°C lows under cloudy, unsettled conditions.[1]

That pricing is broadly consistent with how Hong Kong behaves in early August, when humid monsoon weather typically keeps night-time temperatures elevated rather than producing sharp falls. A useful comparable is August 2025, when the Observatory recorded a monthly low of 24.0°C on the morning of 5 August during persistent rain, showing that heavier rainfall can pull the minimum down, but only modestly in a city where true cool nights are uncommon in midsummer.[16]

For traders, the key catalysts are the Observatory’s final daily extract, any late-night thunderstorm or rain-band shifts, and whether the regional monsoon trough strengthens or weakens enough to alter the overnight minimum. Hong Kong’s official weather pages and city forecasts are the main dependency, while market participants will also be watching whether the already warm August pattern persists into the settlement window; the current crowd stance appears to be anchored mainly on the latest Observatory-aligned forecast rather than on a disruptive weather shock.[1][6][18]

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 Lowest temperature in Hong Kong on August 5? 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.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

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.