Highest temperature in Wuhan on August 20?

Platform comparison

Market context

Wuhan will experience peak summer heat on 20 August 2026, with the highest temperature recorded at Tianhe International Airport Station determining the settlement outcome. The market currently prices all temperature ranges at 0% probability on Polygon, suggesting either incomplete liquidity or awaiting initial price discovery as traders establish positions in USDC-denominated conditional tokens. Resolution hinges on Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when automated systems and manual readings occasionally diverge.

Wuhan's August temperatures have historically clustered between 32–38°C over the past decade, with extreme readings occasionally reaching 40°C during heat waves. The city's location in the Yangtze River valley creates consistent summer humidity and thermal retention, making mid-August reliably hot but rarely producing outlier extremes. Comparable August 20th observations from 2015–2023 show the median high around 34–35°C, with only two instances exceeding 38°C across that period. This historical distribution provides the empirical baseline against which traders should calibrate their range selections.

Traders should monitor China's meteorological forecasts from late July onwards, as the East Asian summer monsoon pattern and any tropical cyclone activity in the Western Pacific could shift Wuhan's weather trajectory. The China Meteorological Administration typically issues 10–14 day outlooks by early August that would clarify whether anomalous heat or cooler-than-normal conditions are expected. Additionally, any significant heat dome affecting central China in early August would signal elevated probability for the higher temperature ranges, whilst typical seasonal patterns would support mid-range outcomes consistent with historical norms.

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 PolyGram, which mirrors the Polymarket order book directly.

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%.