Pronóstico: Highest temperature in Hong Kong on June 26?

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Market context

The Hong Kong Observatory is set to record its absolute daily maximum temperature for 26 June 2026, a real-world metric that will determine the outcome of this prediction market. Today, Polymarket prices the YES contract for any temperature range above the baseline at 0%, implying the crowd believes the event is impossible, yet the seasonal forecast explicitly warns of above-normal temperatures for the June-August period[2].

Historical June data frames this 0% probability as highly questionable, given that daily highs routinely reach 30°C to 33°C, with recent outlooks predicting a heatwave hitting 33°C this week[5][7]. Comparable cases from Bitget Wallet show a similar market for 22 June resolving at 33°C, suggesting that temperatures in this range are standard rather than anomalous for late June in Hong Kong[1]. The average high for June sits at 89°F (approximately 32°C), making the current crowd-implied dismissal of any significant heat statistically inconsistent with long-term averages[3].

Traders should monitor the finalisation of the "Daily Extract" on the Hong Kong Observatory website, as the market cannot resolve until this official data is published[2]. The primary catalyst is the Observatory’s potential issuance of a heatwave warning, which has already been flagged for temperatures expected to hit 33°C from Tuesday to Friday[7]. Additionally, the on-chain mechanics rely on USDC settlement on the Polygon network, where conditional tokens will only execute once the "Absolute Daily Max" is confirmed in the official climate record, creating a direct dependency on the HKO’s data release schedule[6].

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 PolyGram, 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.

Is this market available outside the US?

PolyGram 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 does it cost to trade on PolyGram?

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

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.