Highest temperature in Hong Kong on August 5?

Platform comparison

Market context

Hong Kong’s temperature on 5 August will be set by the Hong Kong Observatory’s final “Absolute Daily Max” reading, not by an intraday forecast, so the market is really about the day’s peak after the full 24-hour observation window closes. The current 0% yes price implies traders see no credible path to an unusually high reading within the settlement range, which is consistent with the way these markets often sit until the Observatory publishes the daily extract.

The closest historical guide is early-August Hong Kong weather itself: hot, humid days are normal, but heavy rain and squally thunderstorms can cap the maximum sharply, as in August 2025 when the Observatory reported 368.9 mm of rain on 5 August and a low of 24.0C that morning. By contrast, late-summer heat episodes can still push the city into the low 30s Celsius, so the key question is whether 5 August behaves like a wet monsoon day or a straightforward hot season day. The market is leaning on the weather pattern rather than any political-style catalyst: a forecast update, rainband timing, or warning signals from the Hong Kong Observatory will matter more than anything else.

The main tradeable trigger is the Observatory’s day-of forecast and any warnings issued before the settlement window closes at 12:00Z. If showers or thunderstorm warnings dominate, the highest temperature is more likely to stay in the upper 20s; if conditions remain broadly dry with strong sunshine, a low-30s print becomes more plausible. The final result will depend on the published daily extract once the data is finalised.

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 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.

FAQ

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 political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

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.