Highest temperature in Hong Kong on June 24?

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Market context

The real-world event centres on the highest temperature recorded by the Hong Kong Observatory on 24 June 2026, measured in degrees Celsius to one decimal place. Current crowd-implied probability sits at 0% for the highest temperature range, yet seasonal forecasts from the Hong Kong Observatory predict above-normal temperatures for June through August 2026, with a high chance of reaching the warmest top 10 on record[1][7]. Historical data reinforces this trend: June 2025 saw the highest absolute maximum temperature for the month at 35.6°C, while the hottest day of 2026 so far reached 34.6°C with hail warnings issued[5][6]. Recent warnings of extreme heat in the New Territories, where temperatures are expected to hit 37°C, further suggest that the 0% probability may understate the likelihood of record-breaking heat[3].

Traders should monitor the Hong Kong Observatory’s Daily Extract publications, which finalise the Absolute Daily Max data once available, as resolution depends entirely on this source[1]. Key catalysts include upcoming seasonal forecast updates and any extreme heat announcements, particularly given the current ENSO status influencing climate models[1]. A recent report from the South China Morning Post highlights Hong Kong’s record-breaking heat trends, underscoring the need to watch for official temperature declarations as the settlement window approaches[5]. The market’s traction correlates with funding flows driving book depth, where deposit fees and withdrawal rails like SEPA and USDC impact trader participation, mirroring the friction seen in payment on-ramps such as Klarna.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Klarna UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Klarna UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.