Highest temperature in Shanghai on August 16?

Platform comparison

Market context

Shanghai's maximum temperature on 16 August 2026 will be measured at Pudong International Airport Station using the Daily Observations table on Weather Underground. The crowd currently assigns zero probability to this occurring, suggesting either extreme confidence in a specific temperature range or minimal trading activity. August in Shanghai typically sees daily highs between 32–35°C, with occasional peaks above 36°C during heat waves, making the full range of plausible outcomes fairly wide.

Historical August data from Shanghai shows considerable year-to-year variation. Between 2015 and 2024, recorded highs on mid-August dates ranged from 29°C to 37°C, with the most common outcomes clustering around 33–35°C. The 0% probability assigned to this market suggests traders may be concentrated in a narrow band—likely the 33–35°C or 34–36°C ranges—leaving potential value in the tails if atmospheric patterns shift. A 0% reading across all temperature brackets would be unusual; this likely reflects settlement mechanics where only one range resolves YES.

The critical variable for mid-August Shanghai weather is the position of the Pacific subtropical high-pressure system and any tropical cyclone activity in the western Pacific. Late July and early August 2026 conditions will signal whether monsoon patterns favour cooler, wetter weather or sustained heat. The China Meteorological Administration issues monthly forecasts in late July that traders should monitor, though these carry inherent uncertainty at the two-week horizon. Local air quality and humidity levels, which affect perceived versus recorded temperatures, typically peak in August but do not alter the thermometer reading used for settlement.

Methodology

This page reviews Highest temperature in Shanghai on August 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 Who Will Win, 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.

UK Frequently Asked Questions

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.

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.

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%.