Highest temperature in Shanghai on July 18?

Platform comparison

Market context

Shanghai's summer temperatures routinely exceed 35°C during mid-July, with the city's humid subtropical climate producing consistent heat across the monsoon season. The Pudong International Airport Station, situated in Pudong District, records official meteorological data that serves as the settlement reference for this market. July 18th falls within the peak summer period when daily highs typically range between 32–37°C, though extreme heat events can push readings toward 40°C or beyond.

Historical data from Wunderground shows Shanghai recorded a high of 40.9°C on July 13th, 2022, and 39.8°C on July 10th, 2013, establishing that temperature ranges above 38°C are plausible but not routine for mid-July dates. The 0% crowd probability suggests traders are either awaiting resolution or treating this as a calibration test rather than an active forecast. For programmatic approaches, integrating Wunderground's historical API alongside seasonal climate models would establish baseline expectations; conditional orders triggered by meteorological alerts from China's National Meteorological Centre could automate position adjustments if extreme heat warnings materialise in the week preceding July 18th.

Monitoring tropical cyclone activity in the Western Pacific becomes material in early July, as storm systems can either suppress temperatures through cloud cover or intensify heat through atmospheric pressure changes. Recent monsoon patterns and any official heatwave declarations from Shanghai's municipal authorities would signal material shifts in outcome probability. Traders should verify Wunderground's data refresh schedule to confirm settlement timing aligns with the 12:00 UTC window.

Methodology

This page reviews Highest temperature in Shanghai on July 18? 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 Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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 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.