Pronóstico: Highest temperature in Shanghai on July 2?

Platform comparison

Market context

Shanghai’s July climate is defined by intense heat, with daily highs typically soaring above 30°C and frequently breaching 35°C, while the settlement window for this contract closes at noon on 2 July 2026. The current 0% YES probability on Polymarket reflects the market’s conviction that the highest temperature recorded at Pudong International Airport will not fall into the lowest temperature range being traded, as historical data shows July highs rarely dip below 24°C [1][8].

Historical patterns frame this probability clearly: in July 2025, Shanghai reached 38°C, and the city regularly experiences around ten days per month where temperatures exceed 35°C [1][2]. The plum rainy season, which ends in early July, has already passed, meaning consistent rain and high humidity are less likely to suppress temperatures today, while the onset of the typhoon season in late July remains a future variable [2]. This seasonal transition supports the market’s view that extreme heat is the norm, not an anomaly.

Traders should monitor real-time Wunderground data for Pudong Airport, as the resolution source is the highest temperature recorded for all times on 2 July [1]. While no immediate weather announcements are scheduled, the absence of the plum rain and the approaching typhoon season are critical dependencies; a sudden typhoon could alter temperatures, though late July is the typical window for such events [2]. The contract’s USDC settlement on Polygon and its conditional token structure mean liquidity will shift rapidly if Wunderground updates show a temperature deviation, but current forecasts suggest highs between 32°C and 35°C [4][5].

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

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 Argentina trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.