Highest temperature in Shanghai on July 16?

Platform comparison

Market context

Shanghai’s highest temperature on 16 July 2026 will be recorded at the Pudong International Airport Station and resolved via Wunderground’s daily history, with the market currently pricing any outcome above the lowest range at 0% YES. This reflects the immediate reality that July is Shanghai’s peak heat month, where daily highs routinely hit 35–36°C, making a sub-30°C maximum exceptionally unlikely under normal conditions [2].

Historical July data shows Shanghai averages 27–36°C, with evenings cooling to around 27°C and rainfall occurring on 12–14 days per month [2]. The 0% crowd-implied probability suggests traders are either misreading the resolution thresholds or assuming an extreme cooling anomaly; in practice, comparable years show no July 16 readings below 30°C at Pudong, framing the current odds as a potential mispricing for programmatically targeted conditional orders.

Key catalysts include real-time weather feeds from AccuWeather and Wunderground, which currently show overcast conditions at 82°F (28°C) with 89% humidity and 27 mph winds at Pudong [1]. Traders should monitor the hourly Wunderground history update at 12:00 UTC on 16 July, as sudden cloud cover or rain could suppress the peak, though such events are statistically rare in mid-July. A bot script polling Wunderground every 15 minutes from 00:00 UTC would capture the exact peak and trigger a conditional buy if the temperature breaches the market’s upper threshold.

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

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 Bot UK. 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'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.

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.