Pronóstico: Highest temperature in Hong Kong on June 25?

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Market context

Hong Kong will experience its peak summer heat on 25 June 2026, with the Hong Kong Observatory recording the absolute daily maximum temperature in degrees Celsius. Historical long-term averages indicate daytime highs typically reach 30°C to 31°C during June, accompanied by high humidity and frequent rainfall[1][2]. Climate models for the 2026 summer season forecast above-normal temperatures across the region due to ongoing climate warming and current ENSO conditions[3]. Given that July and August are statistically the hottest months with averages near 32°C, a June peak of 30°C–31°C is consistent with recent form, making the current 0% crowd-implied probability for any specific high range appear misaligned with established seasonal patterns[2].

Traders must monitor the official release of the "Daily Extract" from the Hong Kong Observatory, which finalises the "Absolute Daily Max" data once the settlement window closes on 25 June 2026 at 12:00 UTC[8]. The primary catalyst is the immediate weather forecast for 25 June, which predicts mainly cloudy skies with sunny periods and a few showers, alongside a temperature range of 28°C to 32°C[4]. Any sudden tropical storm passage, which affects roughly 1.4 days in June on average, could significantly suppress temperatures below the seasonal norm[1]. Investors should watch for real-time updates from the Observatory regarding sea surface temperatures, currently at 27°C at North Point, as warmer waters often correlate with higher daytime maximums[4]. The resolution remains contingent solely on this finalized official dataset, with no alternative sources accepted for settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Hong Kong on June 25? 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?

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.

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, 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.