Highest temperature in Hong Kong on June 27?

Platform comparison

Active sub-markets

Market context

Hong Kong is set to record its highest temperature on 27 June 2026, with the Hong Kong Observatory measuring the absolute daily maximum in degrees Celsius. The market currently implies a 0% probability for the “YES” outcome, yet crowd trading shows 30°C as the frontrunner at 67%, followed by 29°C at 21%, suggesting a sharp divergence between official sentiment and active trader positioning.

Historical data frames this probability: June 2026 forecasts indicate daily highs between 31°C and 33°C, with the Observatory recently recording 34.6°C as the year’s hottest day [9]. Seasonal forecasts for June–August 2026 predict above-normal temperatures in Hong Kong, reinforcing the likelihood of extreme heat [2]. AccuWeather’s monthly data shows average highs near 32°C, aligning with the 30°C–32°C range dominating Polymarket’s book depth [3].

Traders should monitor the Observatory’s final “Daily Extract” release, dependencies on ENSO status, and real-time weather updates. Recent news confirms Hong Kong hit 33.7°C earlier this week, marking the hottest day so far [6]. Funding flows from Klarna deposits and SEPA withdrawals are driving book liquidity, with USDC rails supporting rapid on-ramp friction for high-volume traders. Announcements on heat warnings and hail alerts will be critical catalysts as settlement nears 2026-06-27T12:00:00Z.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on June 27? 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?

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.

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 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.

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.