Highest temperature in Hong Kong on August 3?

Platform comparison

Market context

Hong Kong’s maximum temperature on 3 August will be set by the Hong Kong Observatory’s final daily extract, and the market only resolves once that published figure is available. The current crowd price of 0% for **YES** implies traders are not assigning meaningful weight to a high-end outcome, with the book instead clustered around the more ordinary late-20s Celsius range.

That reading is broadly consistent with August climatology in Hong Kong, when daytime highs are often in the upper 20s to low 30s rather than at the extreme top of the scale. Recent Hong Kong weather coverage has also shown how quickly temperatures can spike in a heatwave, with the Observatory recording 34.3°C this year and local reports of 35–39°C in hotter districts, which is why the market can still move sharply if conditions turn sunnier than expected[11][5].

The main catalyst to watch is the Observatory’s short-range forecast and any same-day shift in cloud, rain, or heat warnings, because those factors determine whether the city finishes closer to 27–28°C or pushes into the low 30s. Polymarket’s own market page cites persistent showers and extensive cloud cover as the current setup, while its live odds place 27°C at 38% and 28°C at 30%, signalling that traders are leaning on the weather forecast rather than on any political-style event calendar[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Hong Kong on August 3? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

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.

FAQ

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.

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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.