Highest temperature in Shanghai on July 12?

Platform comparison

Market context

Shanghai Pudong International Airport is currently experiencing overcast conditions with light rain and strong easterly winds on Sunday 12 July, suppressing any chance of extreme heat today. The market asks whether the day’s peak temperature will fall into a specific high range, yet the crowd-implied probability sits at 0% YES, reflecting the immediate reality of a wet, cloud-covered afternoon with temperatures hovering near 28°C rather than soaring.

Historically, July is Shanghai’s hottest month, with average highs at Pudong reaching 37°C (87°F) and frequent peaks exceeding 35°C during sunny spells [2][5]. However, this year’s July has seen significant variability; while last year’s high reached 32°C (90°F), today’s conditions mirror the cooler, rain-heavy pattern seen in early July 2026, where temperatures struggled to break 29°C [1][3]. The 0% probability aligns with this divergence: traders are pricing in the persistent cloud cover and precipitation that have dominated the region’s weather this week, making a record-breaking heatday statistically improbable under current atmospheric dynamics.

Traders should monitor the National Weather Service time-series for ZSPD for any sudden clearance of clouds or wind shifts that could allow solar heating to accelerate before the 12:00 UTC settlement cutoff [6][8]. The primary catalyst remains the persistence of the rain system; if the overcast layer breaks and winds weaken, temperatures could rise rapidly, though current forecasts from BBC Weather and AccuWeather suggest continued light rain and gusty winds through the afternoon [3][7]. No official meteorological announcements are scheduled, but real-time updates from Wunderground—the designated resolution source—will be critical as the day progresses toward the settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on July 12? 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 Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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

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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.