Lowest temperature in Hong Kong on August 8?

Platform comparison

Market context

Hong Kong’s minimum temperature for 8 August will be set by the Hong Kong Observatory’s final daily extract, with the market resolving on the published “Absolute Daily Min (deg. C)” once the data are confirmed. Early readings already point to a warm night: at 3 a.m., the Observatory reported 29°C at its headquarters, with several urban stations in the 27–30°C range, which is consistent with a low well above the cooler bands that would be needed for a surprise result.[14]

Historically, August in Hong Kong is a persistently hot, humid month rather than one that often throws up genuinely cool lows. The Observatory’s 1991–2020 normals show an average minimum of 26.9°C on 8 August, while other August summaries place typical overnight lows around 27°C, with record lows in the high teens only appearing as extreme outliers.[2][13] That profile means the current 0% crowd-implied probability for a very low outcome is broadly in line with climatology; the practical question is whether the day settles near the usual upper-20s band or slips marginally lower after rain, cloud, or a stronger overnight breeze.

For traders, the key catalyst is not politics-style announcements but the sequence of hourly Observatory readings through the rest of the night and early morning, followed by the daily extract publication that locks in the official minimum. The main dependency is whether cloud cover and showers ease enough for radiational cooling before dawn; if the pre-dawn pattern stays muggy, the floor is likely to remain close to the early 29°C reading rather than drift towards the lower end of the August range.[14][2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Lowest temperature in Hong Kong on August 8? 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

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.

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.

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.

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.