Highest temperature in Shanghai on July 4?

Platform comparison

Market context

The underlying event is the peak daytime heat at Shanghai Pudong International Airport on 4 July 2026, measured in degrees Celsius. Historical data confirms July is Shanghai’s hottest month, with average highs reaching 32.5°C (90.5°F) and frequent spikes above 35°C (95°F) under clear skies [1][4]. The crowd-implied probability of 0% for any specific temperature range suggests the market currently treats the outcome as impossible or mispriced, yet comparable cases from recent summers show Pudong temperatures exceeding 40°C in parts of the district [7]. This contrarian angle implies the consensus may be ignoring the likelihood of extreme heat, creating value for traders betting on higher ranges.

Traders should monitor the Shanghai Meteorological Bureau’s daily forecasts and real-time weather updates for Pudong, as sudden shifts in cloud cover or wind patterns could alter peak temperatures [7]. Recent reports indicate temperatures in parts of Pudong have already breached 40.4°C this summer, reinforcing the risk of extreme heat on 4 July [7]. Additionally, watch for announcements on urban heatwave advisories or changes in shortwave solar energy, which is gradually increasing in July and could amplify daytime highs [1]. The value spot lies in betting against the 0% consensus, given the historical precedent of extreme temperatures in Shanghai’s summer climate [6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on July 4? 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 Who Will Win, 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Who Will Win 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.