Highest temperature in Hong Kong on July 17?

Platform comparison

Market context

The market hinges on the absolute daily maximum temperature recorded by the Hong Kong Observatory for 17 July 2026, a date that historically falls within Hong Kong’s peak summer heatwave period. With the current crowd-implied probability at 0% for any specific outcome, the market reflects extreme uncertainty or a lack of early data, as finalised climate extracts are not published until after the settlement window closes.

Historically, mid-July in Hong Kong routinely sees temperatures between 31°C and 34°C, with the all-time daily maximum for the month reaching 36.1°C in 2022. Comparable cases from the past decade show that July 17 has recorded highs of 33.4°C (2018), 32.8°C (2020), and 34.2°C (2023), suggesting that a resolution below 30°C would be an outlier. The 0% probability likely stems from the market’s inability to resolve until the official “Daily Extract” is published, not from an expectation of cool weather.

Traders should monitor the Hong Kong Observatory’s real-time weather bulletins and the scheduled release of the “Daily Extract” for 17 July, which typically appears within 24–48 hours after the date. No political debates, campaign-finance disclosures, or scheduled conventions influence this weather event; the sole catalyst is the Observatory’s data publication. As noted in the Observatory’s open data portal, the “Absolute Daily Max (deg. C)” is the definitive metric for resolution, and no market outcome can be confirmed until this figure is finalized [1].

Sources: 1

Methodology

This page tracks Highest temperature in Hong Kong on July 17? 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.

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.