Highest temperature in Hong Kong on July 20?

Platform comparison

Market context

Hong Kong is experiencing a historically warm July in 2026, with the Hong Kong Observatory recording significant rainfall and issuing Hurricane Signal No. 1 during typhoon Wipha’s impact on 20 July last year, though that event suppressed peak temperatures due to cloud cover and wind [1]. Historical data for mid-July in Hong Kong typically shows maximum temperatures ranging between 31°C and 34°C, with extreme heatwaves occasionally pushing readings to 35°C or higher under clear, stagnant conditions. The current 0% crowd-implied probability for any specific high-temperature range suggests traders expect the day to remain cloudy or rainy, mirroring the 2025 pattern where the hurricane signal prevented extreme heat [1].

Traders should monitor the Hong Kong Observatory’s real-time weather bulletins and the “Daily Extract” publication scheduled for 21 July 2026, which will finalise the “Absolute Daily Max (deg. C)” for settlement [1]. Key catalysts include the trajectory of any residual tropical systems, the timing of rain cessation, and the onset of afternoon sunshine, as clear skies post-rain often trigger rapid temperature spikes. Recent climate reports indicate July 2026 has been warmer than average, increasing the likelihood of a high-temperature outlier if the hurricane influence dissipates before noon [1]. The market leans on the dependency between cloud cover duration and peak temperature, with settlement contingent on the Observatory’s official data release.

Sources: 1 · 2

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 July 20? 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.

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.

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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.