Highest temperature in Hong Kong on June 27?

Platform comparison

Active sub-markets

Market context

The real-world event hinges on the Hong Kong Observatory’s official reading of the absolute daily maximum temperature in degrees Celsius for 27 June 2026, a figure that will be finalized only once the “Daily Extract” is published. This market resolves strictly to the temperature range containing that recorded value, with settlement confirmed by 12:00 UTC on 27 June 2026.

Historically, late June in Hong Kong has seen extreme heat, with 10 June 2025 reaching 35.6°C and matching the June record set in 1963[6]. Just days prior, the Observatory recorded 36.1°C—the hottest day of the year so far, breaking the 1963 benchmark of 35.5°C[3][10]. Seasonal forecasts for June–August 2026 predict above-normal temperatures across Hong Kong, driven by current ENSO conditions and climate model outputs[2]. Given this trajectory, the current 0% crowd-implied probability for the lowest temperature range appears inconsistent with recent data and official projections, suggesting traders should reassess the market’s pricing using historical highs and the Observatory’s seasonal guidance.

Traders approaching this programmatically should monitor the Observatory’s “Daily Extract” release schedule, as resolution cannot occur until data is finalized. Key catalysts include real-time weather alerts for extreme heat, which the Observatory has already issued for recent days[7][10], and updates to the ENSO status that influence temperature forecasts[2]. A bot strategy would integrate the Observatory’s API for daily max readings and cross-reference with the seasonal forecast page[2] to validate temperature ranges. Recent news from SCMP confirms the Observatory’s active heat warnings and record-breaking readings, reinforcing the likelihood of high temperatures in the coming week[3][10]. Programmatic traders must ensure their conditional orders trigger only after the Daily Extract is published, avoiding premature settlement attempts.

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

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 Polymarket Bot 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.

Is this market available outside the US?

Polymarket Bot 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 Bot UK?

Zero. Polymarket Bot 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 Bot UK triggers a quick verification flow that finishes in minutes.