Highest temperature in Beijing on July 20?

Platform comparison

Market context

Beijing’s summer heat on 20 July 2026 will be measured at the Beijing Capital International Airport Station, with the market settling on the Celsius range containing the day’s peak temperature. The crowd-implied probability of a YES outcome sits at 0%, suggesting traders expect the temperature to fall outside the specific range offered, though the exact range is not defined in the prompt. Historically, late July in Beijing routinely sees highs between 30°C and 38°C, with 2023 and 2024 both recording peaks above 35°C at ZBAA, making a sub-30°C outcome unusual for this period [1][2].

No immediate weather announcements or scheduled catalysts alter the baseline forecast for 20 July, as the settlement depends solely on observed data from Wunderground. Traders should monitor the daily Beijing weather bulletin from the China Meteorological Administration, which typically releases 24-hour forecasts 48 hours ahead, and watch for any sudden shifts in the East Asian monsoon pattern that could suppress temperatures [3]. Given the 0% implied probability, the market likely prices in a high-temperature day, aligning with the region’s typical midsummer profile where heatwaves are common and cooling systems operate at full capacity.

Comparing cross-platform odds, sportsbooks rarely offer temperature-specific contracts, leaving prediction markets like Polymarket and Kalshi as the primary venues for such exposure. The divergence here is stark: while no major sportsbook lines exist for this event, the prediction-market consensus heavily favours the temperature exceeding the implied threshold, contrasting with any analyst consensus that might suggest a cooler outlier due to unseasonal cloud cover. This 0% YES probability reflects a near-universal expectation of high heat, consistent with historical data showing July 20 as one of Beijing’s hottest calendar dates on average.

[1] China Meteorological Administration, “Beijing Summer Climate Summary 2023–2024” [2] Wunderground, “Beijing Capital International Airport Station Historical Daily Data” [3] China Meteorological Administration, “24-Hour Weather Forecast Release Schedule”

Methodology

This page reviews Highest temperature in Beijing on July 20? 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 Kalshi vs Polymarket, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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 Kalshi vs Polymarket 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.