Highest temperature in Beijing on July 13?

Platform comparison

Market context

Beijing’s highest temperature on 13 July 2026 will be measured at the Beijing Capital International Airport Station, with settlement based on Wunderground’s daily peak in degrees Celsius. Historically, mid-July in Beijing is the hottest period, with average highs near 31°C (88°F) and frequent spikes above 35°C [4][5]. The city’s all-time record is 41.9°C, set on 24 July 1999, while recent summers have seen peaks exceeding 40°C, including 40°C in July 2023 and 41.1°C in June 2023 [1][2][3]. Given this pattern, a 0% crowd-implied probability for any temperature range suggests the market may be mispriced or the resolution ranges are unusually narrow, as temperatures in this window almost invariably exceed 30°C.

Traders should monitor daily weather forecasts from the China Meteorological Administration and real-time Wunderground data for the ZBAA station, as heatwaves and humidity levels are the primary catalysts for extreme readings [1][2]. A recent Reuters report highlighted Beijing’s vulnerability to returning heatwaves, noting that southern suburbs recorded 41.8°C during the June 2023 event, underscoring the volatility of peak temperatures in this region [2]. Programmatically, one would scrape Wunderground’s hourly history for ZBAA, apply a conditional order when forecasts predict highs above 35°C, and use copy-trading bots to mirror positions from traders with strong historical accuracy in weather markets. The settlement window closes at 12:00 UTC on 13 July 2026, so automated checks must run continuously until that timestamp.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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 Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.