Highest temperature in Shanghai on July 15?

Platform comparison

Market context

Shanghai Pudong International Airport is currently recording 29°C at 6 AM UTC on 15 July 2026, with a forecast maximum of 35°C for the day[1][2]. The Polymarket contract for the highest temperature range on this date shows a 0% implied probability for the YES outcome, suggesting the crowd believes the peak will fall outside the specific range defined by the market’s resolution criteria. Given the current morning temperature and the projected daily maximum, traders are effectively pricing in a high likelihood that the day’s peak will not reach the threshold required for a YES resolution.

Historically, mid-July in Shanghai often sees highs between 33°C and 37°C at Pudong, with several years in the 2010s and 2020s exceeding 36°C. However, the current 0% probability implies the market expects this year’s peak to stay below the YES threshold, possibly due to cloud cover or rain expected today—about 1 mm of precipitation is forecast, which could suppress the maximum temperature[1]. This divergence from typical seasonal highs frames the current pricing as a bet on an anomalously cool day rather than a standard summer peak.

Traders should monitor real-time updates from Wunderground, the official resolution source, as the day progresses toward the 12:00 UTC settlement window. Any sudden shifts in cloud density, wind gusts (currently 29kt), or rainfall intensity could alter the final maximum temperature[2]. Since the market resolves on USDC via Polygon using conditional tokens, positions can be entered or exited instantly, but the lack of YES probability suggests minimal speculative interest until the afternoon peak is confirmed.

Sources: 1 · 2

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? 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.