Highest temperature in Shanghai on June 29?

Platform comparison

Market context

Shanghai’s Pudong International Airport is entering its peak summer heatwave window, where daily highs typically climb from 77°F to 83°F (25°C to 28°C), rarely dipping below 69°F or exceeding 92°F (33°C) on the most intense sunny days[1]. Historical patterns show summer temperatures regularly surpassing 30°C (86°F), with extremes reaching 35°C (95°F) during clear, high-pressure spells[4]. On cloudy or rainy days, highs hover near 25–30°C (77–86°F), while lows stay around 20°C (68°F)[6]. Given this baseline, a 0% crowd-implied probability for any specific high-temperature range appears inconsistent with the region’s well-documented thermal behaviour, suggesting a meaningful divergence between prediction-market pricing and analyst consensus on seasonal norms.

Traders should monitor the Shanghai Meteorological Bureau’s daily heatwave advisories and the timing of the East Asian monsoon’s northward shift, which directly influences cloud cover and precipitation intensity[5]. Recent forecasts for 29 June indicate a 25% risk of thunderstorms with light rain and temperatures near 24°C (75°F), potentially suppressing peak highs below the seasonal average[5]. The resolution hinges on Wunderground’s recorded maximum for all times on that day at ZSPD, making real-time updates from the National Weather Service critical for tracking deviations from the 25–33°C range[2]. Any sudden shift in the monsoon’s position or an unexpected high-pressure system could trigger a rapid repricing, as current odds fail to reflect the volatility inherent in Shanghai’s humid, transitional summer climate.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on June 29? 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 UK, 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

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.

Do I need to KYC for this market?

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