Lowest temperature in Hong Kong on August 5?

Platform comparison

Market context

Hong Kong’s overnight low on 5 August is likely to be decided by the strength of the summer monsoon rather than any discrete political event, because the market resolves to the Hong Kong Observatory’s final “Absolute Daily Min” reading for that date. The current crowd position is heavily concentrated on **27°C**, with the market showing **96%** there and only **5%** on **26°C**, which is consistent with Hong Kong’s muggy August baseline and a forecast profile dominated by light winds, high humidity and isolated showers.[1][4][17]

The historical frame for reading that probability is that Hong Kong’s August minima usually sit in the mid-to-high 20s Celsius, so anything below 26°C generally requires a stronger rain band, unusual cloud cover or a cooler air mass than traders normally see in early August.[1][13][15] Last year’s August weather included a low of **24.0°C** on 5 August amid persistent downpour, showing that the market can flip quickly if rainfall arrives at the right time, but the present price implies traders view that kind of cooler setup as unlikely this year.[15]

The main catalyst to watch is the Hong Kong Observatory’s short-range forecast and any day-of changes in rainfall or wind, because the settlement source uses the Observatory’s published daily extract and ignores later revisions after initial publication for the relevant window.[1][5] In practice, the market is leaning on whether evening showers linger into the early hours or whether skies partially clear, which would keep the minimum closer to 27°C; if forecast guidance turns wetter or more persistent overnight, the 26°C bucket is the first place the crowd would reassess.[1][4][17]

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.

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.