Pronóstico: Highest temperature in Shenzhen on July 19?

Platform comparison

Market context

Shenzhen's peak temperature on 19 July 2026 will be recorded at Bao'an International Airport Station and resolved against Wunderground historical data. The market currently prices all temperature ranges at 0% on Polygon, suggesting either a technical settlement lag or that traders are awaiting fresh meteorological forecasts before committing USDC to conditional tokens. This is atypical for weather markets with defined resolution windows, particularly those settling within a year.

July in Shenzhen sits at the height of the East Asian summer monsoon season. Historical data from the past decade shows peak temperatures on mid-July dates typically ranging between 32–35°C, with occasional excursions to 36°C during heat waves. The 2023 summer saw multiple days exceed 35°C in the region; 2024 followed similar patterns. Current market pricing at zero across all ranges suggests traders may be waiting for seasonal forecasts or are treating this as a placeholder contract pending liquidity events.

Traders monitoring this market should track the China Meteorological Administration's extended-range forecasts released in early July 2026, which typically provide 10–14 day outlooks for Guangdong Province. El Niño or La Niña conditions active during northern hemisphere summer can shift monsoon intensity and thus peak daily temperatures. Additionally, any tropical cyclone activity in the South China Sea during mid-July could suppress temperatures through cloud cover and precipitation, a factor worth monitoring via typhoon tracking services in the weeks preceding settlement.

Methodology

We track Pronóstico: Highest temperature in Shenzhen on July 19? 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

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

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.

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'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 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.