Highest temperature in Hong Kong on June 24?

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Market context

On 24 June 2026, Hong Kong will face its peak daily heat, with the Hong Kong Observatory set to record the absolute maximum temperature for the day. The crowd-implied probability for any outcome above the lowest range sits at 0% YES, suggesting the market currently treats extreme heat as virtually impossible. This stance contradicts recent historical patterns, where June has frequently delivered highs near or above 32°C. In 2016, the month’s mean maximum reached 32.4°C, the highest since 1885, while 2025 saw a record-breaking 35.6°C on a single June day[3][4][7]. Short-range models for the preceding day, 23 June, already converge on a typical maximum between 32°C and 33°C, indicating the atmosphere is primed for June-typical warmth rather than cool anomalies[1].

Traders should monitor the Hong Kong Observatory’s daily extract releases, which finalise the “Absolute Daily Max” data once the 24 June record is locked in. The key dependency is the publication timeline, as the market cannot resolve until this official figure appears in the relevant climate dataset[6]. Recent news confirms Hong Kong is experiencing a historic heatwave, with temperatures soaring to 34.3°C just days prior, reinforcing the likelihood of elevated readings[5]. Contrarian value may sit in the 32°C–33°C range, where consensus models align, while the market’s 0% probability for higher outcomes appears mispriced against the city’s warming trend, which has increased by 0.35°C per decade since 1996[8]. The favourite is the 32°C–33°C band; the underdog is any outcome below 30°C, which lacks historical support in recent June data[9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on June 24? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

Who Will Win 2026 is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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, Who Will Win 2026 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.