Highest temperature in Hong Kong on June 26?

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Market context

The real-world event centres on the absolute daily maximum temperature recorded by the Hong Kong Observatory on 26 June 2026, measured in degrees Celsius to one decimal place. This single data point will determine which temperature range resolves the market, with the settlement window closing at 12:00 UTC on that date. The current crowd-implied probability of 0% for a specific outcome appears inconsistent with the broader market depth, where "31°C" leads at 54% and "32°C" follows at 40%, having generated $26.5K in trading volume[1].

Historical patterns and comparable cases frame how to interpret these probabilities. June in Hong Kong typically sees average highs between 28°C and 32°C, with the month being hot and humid as summer conditions prevail[3]. The Hong Kong Observatory’s seasonal forecast for June–August 2026 explicitly predicts above-normal temperatures, reinforcing the likelihood of readings near the upper end of the historical range[4]. Recent forecasts for June 2026 show daily highs ranging from 85°F to 92°F (approximately 29°C to 33°C), with an average high of 89°F (32°C)[5]. A recent warning from the Observatory noted urban temperatures reaching 35°C on a Friday, indicating the potential for extreme heat events that could push readings beyond the typical average[10].

Traders should monitor the official "Daily Extract" publication from the Hong Kong Observatory, which finalises the "Absolute Daily Max" data once available[6]. Key catalysts include the timing of this data release and any sudden shifts in weather patterns, such as the sunny intervals with showers forecast for 26 June, which could moderate peak temperatures[6]. The market’s traction is directly tied to funding flows; as deposit fees and withdrawal rails like SEPA and USDC become more efficient, book depth expands, allowing larger positions to be taken on these temperature forecasts. Recent news from the Observatory confirms that extreme heat warnings are active, suggesting traders must watch for real-time updates that could alter the final resolution[10].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Klarna UK, which mirrors the Polymarket order book directly.

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?

Polymarket Klarna UK 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.

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.

What does it cost to trade on Polymarket Klarna UK?

Zero. Polymarket Klarna UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.