Highest temperature in Shanghai on July 16?

Platform comparison

Market context

Shanghai is currently experiencing mid-July heat, with the Hongqiao International Airport recording 28°C at 4 AM UTC on 16 July 2026. The prediction market in question bets on whether the day’s peak temperature at Pudong International Airport will fall into a specific, unnamed range, yet the crowd has assigned a 0% probability to the YES outcome. This implies the market believes the temperature will not reach the threshold required for that range, despite the season typically bringing highs well above 30°C in Shanghai.

Historically, Shanghai’s July highs frequently exceed 33°C, with records reaching 39°C in recent years. A 0% implied probability is therefore anomalous unless the target range is set unrealistically high—perhaps above 40°C—or the market has received specific, non-public forecast data suggesting a cool anomaly. Comparable cases from 2023 and 2024 show daily peaks consistently between 34°C and 37°C, making a zero-probability stance on any range below 38°C highly questionable without further catalysts.

Traders should monitor the 12-hour forecast updates from Wunderground and the China Meteorological Administration’s daily release, which typically arrives by 08:00 UTC. A sudden drop in expected temperatures would require an unusual weather system, such as a strong rain front or typhoon influence, neither of which is currently forecast for Shanghai this week. Without such a catalyst, the 0% line appears misaligned with seasonal norms, suggesting either a data error or an unusually narrow resolution range that excludes plausible outcomes.

Sources: 1

Methodology

This page reviews Highest temperature in Shanghai on July 16? 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

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 Best Prediction Markets. 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.

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 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.