Highest temperature in Shanghai on August 17?

Platform comparison

Market context

Shanghai's maximum temperature on 17 August 2026 will be measured at Pudong International Airport Station and recorded in Weather Underground's Daily Observations table. The current market pricing reflects zero probability across all temperature ranges, a positioning that typically emerges when traders await sufficient historical data or when settlement mechanics remain unfamiliar to the broader user base. On Polygon, this conditional token contract trades in USDC pairs, with the winning range token redeemable 1:1 post-settlement once Weather Underground publishes the official daily observation.

Mid-August temperatures in Shanghai historically cluster between 32–36°C, with occasional peaks above 37°C during particularly intense heat waves. The city's subtropical climate produces consistent summer highs, though the specific daily maximum varies by 2–4°C depending on cloud cover, humidity patterns, and urban heat island effects. August 2023 recorded a peak of 38.1°C on the 16th; August 2024 saw 37.2°C on the 14th. These precedents suggest the market's zero-probability pricing may reflect traders' uncertainty about which discrete range bins capture the eventual reading rather than genuine doubt about whether a measurable high will occur.

Traders monitoring this contract should track China Meteorological Administration forecasts released in early August 2026, which typically project Shanghai's conditions 10–14 days ahead. Typhoon activity in the Western Pacific during mid-August could suppress temperatures by 3–5°C if systems approach the region; conversely, a stationary high-pressure system would push readings toward the 37–39°C bands. Weather Underground's historical data feed occasionally experiences minor reporting delays, though Pudong Airport's automated station generally publishes observations within hours of the settlement window close.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

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.

UK Frequently Asked Questions

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 Scam?. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.