Highest temperature in Shenzhen on July 10?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Shenzhen Bao'an International Airport on 10 July 2026, measured in degrees Celsius and sourced from Wunderground. Polymarket prices this contract today with the leading outcome at 33°C holding 41% probability, while 34°C sits at 23%, and the market currently assigns 0% to a YES outcome for any temperature exceeding the implied range[1][10].

Historical data frames how to read these probabilities: July is Shenzhen’s hottest month, with average highs near 32°C to 35°C and daily peaks often reaching 35°C or above in late July[2][4][7]. AccuWeather’s 2026 forecast for Shenzhen shows daily highs ranging from 87°F to 94°F (30.6°C to 34.4°C), aligning closely with the market’s 33°C frontrunner[2]. Climate-Data.org lists 34°C as the average for 10 July, suggesting the 33°C outcome is slightly conservative but plausible given typical variability[9].

Traders should monitor real-time weather updates from Wunderground and local meteorological announcements, as sudden shifts in cloud cover or humidity can alter peak temperatures within hours. Recent travel guides note that July weather is peak summer, muggy and warm, with temperatures frequently hitting 32°C to 35°C, reinforcing the need to watch for any official heat advisories or extreme weather bulletins from Guangdong authorities[5]. On-chain mechanics remain straightforward: USDC settlements on Polygon via conditional tokens, with volume thin but reactive to new forecast data[1][10].

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