Pronóstico: Highest temperature in Hong Kong on July 1?

Platform comparison

Market context

The Hong Kong Observatory will record the absolute daily maximum temperature in degrees Celsius on 1 July 2026, resolving to a specific range measured to one decimal place. On Polymarket, this contract currently prices the "33°C" range at 90% implied probability, while the "YES" outcome for any temperature above 34°C sits at 0%. The market consensus clusters tightly between 31°C and 33°C, reflecting uncertainty in the precise balance between seasonal warmth and short-term synoptic influences, with the 34°C range trailing at just 13%.

Historical precedents and the Observatory’s seasonal outlook for July–September 2026 frame this pricing, projecting normal to above-normal temperatures amid the long-term warming trend. Typical early-July climatology under prevailing southwesterly flow sees daytime highs around 31°C, yet recent data shows the absolute maximum for the year so far reached 35.4°C on 30 May[7]. This seasonal warmth, combined with persistent high humidity and weak diurnal cooling, suggests that 33°C is a statistically robust frontrunner, consistent with the market’s heavy weighting against lower ranges.

Traders should monitor the Hong Kong Observatory’s upcoming "Daily Extract" publication schedule, which is the sole catalyst for final resolution once data is finalized. The multi-model consensus forecast system for the Pearl River Delta region will also provide critical short-term signals on synoptic shifts that could push temperatures beyond the 33°C threshold[9]. Any official announcements regarding unusual weather patterns or heatwaves in south China during the settlement window will directly impact the conditional tokens on the Polygon network, where USDC liquidity remains active for this weather event.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Hong Kong on July 1? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Argentina, which mirrors the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Argentina. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.