Highest temperature in Hong Kong on June 20?

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Active sub-markets

Market context

Hong Kong’s highest temperature today will be set by the Hong Kong Observatory’s final daily extract, which means the relevant number is the **absolute daily maximum in °C** once the record is published, not an intraday forecast value. With settlement tied to the observatory’s own data, the key issue is whether the day produces a genuinely standout peak before the noon UTC window closes, especially given that Hong Kong’s June climate typically sits in a hot, humid range and the Observatory expects **above-normal temperatures** across June to August 2026.[1][2]

The current **0% YES** pricing looks more like funding friction than a view on meteorology. In prediction markets, low-cost on-ramp options such as **Klarna**, **SEPA**, and **USDC** tend to matter because they determine how quickly traders can add exposure when weather risk looks mispriced; if deposits are delayed, fees are high, or withdrawal rails are awkward, books can stay thin even when the underlying event is straightforward. That matters here because temperature markets usually attract modest, fast-moving interest rather than deep structural liquidity, so the book can remain sticky at zero until a catalyst forces fresh balances onto the platform.

For traders, the main drivers are the Observatory’s midday and afternoon updates, any local heat advisories, and whether the final daily extract lands cleanly in the settlement window. Hong Kong’s 2025 weather review highlighted a **June absolute maximum of 35.6°C**, showing that late-June heat spikes are plausible even in an already warm month, while June 2026 forecast guidance from AccuWeather pointed to daily highs mostly in the high 80s to mid-90s °F, or roughly the low-to-mid 30s °C.[5][2] The market will be most sensitive if a hot spell coincides with easy funding access, since that is when new deposits are most likely to translate into immediate order flow and move a shallow book.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.