Highest temperature in Shenzhen on July 7?

Platform comparison

Market context

Shenzhen is currently experiencing heavy thundershowers and wind, with temperatures hovering around 29°C and a 93% chance of further thunderstorms today. This immediate deluge, which includes 57mm of heavy rain expected overnight, has driven the crowd-implied probability for a record-breaking high temperature to 0%, as the prevailing cloud cover and precipitation actively suppress any potential for extreme heat spikes.

Historically, July is the hottest month for Shenzhen Bao'an International Airport, with average highs reaching 32°C and muggy conditions persisting for 31 days, yet the current wet pattern mirrors the peak precipitation season seen in June rather than the dry, scorching heat typical of late July. While the airport usually records highs near 30.9°C by late July, the early-month frontal boundary and moisture focus described by the National Weather Service create a stark contrast to the clear, high-temperature days traders typically expect, making a record high statistically improbable under these specific atmospheric conditions[2][3].

Traders should monitor the dissipation of the current frontal boundary and the timing of the next high-pressure system, as a shift to dry, sunny conditions could rapidly alter the temperature trajectory. Recent forecasts indicate a transition to lighter winds and reduced showers by Wednesday, but the persistence of heavy rain through Monday night remains the primary dependency for maintaining low temperatures; any sudden announcement of a rapid clearing trend or a shift in the monsoon trough would be the critical catalyst to watch for a potential probability rebound[1][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on July 7? 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

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

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 Prediction Today 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.