Lowest temperature in Hong Kong on August 6?

Platform comparison

Market context

Hong Kong’s early-August minimum temperature is usually set by a humid, marine summer pattern rather than a sharp cold spell, so the key question is whether overnight rain and cloud keep the Observatory’s low in the upper 20s or allow a slightly cooler reading before sunrise. Hong Kong Observatory climatology puts 6 August’s normal mean minimum at 26.8°C, with August as a whole averaging a mean minimum around 26.6°C, so the market’s **0% YES** price is broadly consistent with a market that is waiting for an outcome to be fixed in one of the ordinary summer bands rather than a genuine anomaly.[1][7]

Recent comparables point the same way. The Observatory’s August 2024 summary described an exceptionally hot month, while August 2025 still featured very warm conditions alongside heavy rain and a low of 24.0°C on 5 August before heat returned the next day, showing how quickly a wet night can move the minimum without implying a sustained cool pattern.[8][12] For traders, the decisive catalyst is the Hong Kong Observatory’s final daily extract for 6 August, which will publish the “Absolute Daily Min” used for settlement; until then, the market is effectively leaning on the realised overnight weather rather than any campaign-style calendar of announcements.[13]

What matters most in practice is the pre-dawn rain and cloud cover around the Observatory site, because that is what can pull the minimum down within the usual August range. The current setup should therefore be read as a weather-data release trade, not a narrative on broader seasonal averages: if the overnight profile stays humid and overcast, the result is more likely to sit near the long-run norm; if clearing arrives before dawn, the low can print a touch higher, but still usually well short of anything that would surprise climatology.[1][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 Lowest temperature in Hong Kong on August 6? 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

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

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.

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.