Pronóstico: Highest temperature in Hong Kong on July 2?

Platform comparison

Market context

The Hong Kong Observatory is set to record the absolute daily maximum temperature in degrees Celsius for 2 July 2026, a figure that will determine the outcome of this prediction market. Today, Polymarket prices the YES contract at 0%, implying the crowd believes the temperature will fall outside the specific range being wagered on, despite seasonal forecasts suggesting normal to above-normal heat for the region[1].

Historical July data frames this near-zero probability with caution; AccuWeather projects daily highs in Hong Kong for July 2026 to range between 30°C and 36°C (86°F to 96°F), with an average high well above the threshold that might trigger a YES resolution in a tighter band[2]. The HKO’s own seasonal outlook for July–September 2026 explicitly calls for above-normal temperatures driven by the long-term warming trend and current ENSO status, making a cool day statistically unlikely[1][3].

Traders should monitor the HKO’s final "Daily Extract" publication, which is the sole resolution source and will only be available after the data is finalized[8]. The immediate catalyst is the forecast for scattered clouds and temperatures between 28°C and 33°C expected for 2 July, which currently sits just below the upper limit of many high-range brackets[8]. Any sudden shift in cloud cover or the arrival of a tropical system could alter the maximum, but the current on-chain mechanics on Polygon (using USDC and conditional tokens) reflect a high confidence in the 28–33°C range as the likely outcome[3].

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). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.