Highest temperature in Beijing on July 28?

Platform comparison

Market context

Beijing's summer temperatures peak in late July, with historical records showing daily highs frequently exceeding 35°C during this period. The settlement mechanism relies on Weather Underground's historical data feed from Beijing Capital International Airport Station, the official meteorological reference point for the city. The market resolves based on the single highest temperature recorded across all times on 28 July 2026, requiring traders to assess not just average conditions but tail-end heat events that can spike several degrees above seasonal norms within a single day.

The 0% crowd probability reflects genuine uncertainty rather than consensus bearishness. Beijing's July temperatures have ranged from 29°C to 41°C in recent decades depending on atmospheric patterns. The China Meteorological Administration publishes 10-day forecasts roughly weekly; traders monitoring these releases from mid-July onwards gain directional signals on whether high-pressure systems will dominate the region. Additionally, El Niño or La Niña phases influence East Asian summer heat patterns, making broader climate indices worth tracking through June and early July.

For programmatic approaches, the key dependency is Weather Underground's data availability and accuracy. Traders building conditional orders should verify the station's reporting consistency—capital airport stations rarely experience outages, but data delays occasionally occur. The settlement window closes at midday UTC on 28 July, creating a hard deadline; any temperature recorded after the market closes cannot influence resolution. Cross-referencing against China's official meteorological records beforehand helps calibrate confidence in the Weather Underground feed's historical alignment.

Methodology

This page reviews Highest temperature in Beijing on July 28? 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 Review 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

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.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Review UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.