Highest temperature in Beijing on August 11?

Platform comparison

Market context

Beijing's maximum temperature on 11 August 2026 will be recorded at the Capital International Airport Station and reported through Weather Underground's Daily Observations table. The market currently prices all temperature ranges at 0% probability on Polygon, suggesting either a technical settlement issue or minimal liquidity in USDC-denominated conditional tokens. Resolution hinges on the specific data point from Weather Underground's granular observations rather than the Day High & Low summary section, a distinction that matters when intraday spikes occur.

August in Beijing typically sees daily highs between 29–34°C, with occasional peaks above 35°C during heat waves. Historical data from 2015–2023 shows that extreme heat events—temperatures exceeding 37°C—occur roughly once every two to three years during mid-August. The 2022 summer saw sustained temperatures above 35°C for extended periods, whilst 2020 remained comparatively mild. Current climate patterns and the El Niño/La Niña cycle influence seasonal intensity, making historical frequency a reasonable baseline for assessing tail-risk probabilities in temperature ranges above 36°C.

Traders should monitor China Meteorological Administration forecasts released in late July and early August, which typically provide ten-day outlooks with reasonable accuracy. Real-time atmospheric pressure systems and moisture patterns from the Western Pacific will determine whether monsoon activity or high-pressure ridges dominate on that date. Any significant weather announcements from Beijing's municipal authorities regarding heat warnings or air quality alerts would signal elevated temperatures, though such warnings often lag actual conditions by 24–48 hours.

Methodology

We track Highest temperature in Beijing on August 11? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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%.