Highest temperature in Shenzhen on July 28?

Platform comparison

Market context

Shenzhen's summer climate on 28 July will determine whether the daily maximum temperature at Bao'an International Airport exceeds specific thresholds. The settlement mechanism relies on Wunderground's historical weather database, which aggregates readings across all hours on that date. The 0% crowd probability suggests traders currently perceive the market as either mispriced or awaiting clarification on the exact temperature bands available for resolution.

July represents peak summer in Shenzhen, with historical data from the past decade showing daily highs consistently between 32–35°C during this period. The 2023 and 2024 records show 28 July temperatures of 33.8°C and 34.2°C respectively, establishing a baseline for what constitutes typical versus anomalous conditions. Extreme heat events pushing above 36°C occur but remain statistically infrequent; the region's subtropical monsoon patterns typically moderate peak temperatures through afternoon convection and sea-breeze effects from the South China Sea.

Traders should monitor the China Meteorological Administration's extended forecasts as July 2026 approaches, particularly any alerts for heat waves or unusual pressure systems that might drive temperatures into the upper 35°C range. Typhoon activity in the Western Pacific during late July could suppress temperatures through cloud cover and moisture influx, though such systems typically arrive after the 28th. Settlement precision depends entirely on Wunderground's data feed from Bao'an station; any reporting gaps or sensor issues would affect resolution timing, making real-time verification against secondary sources advisable closer to the settlement window.

Methodology

This page reads Highest temperature in Shenzhen on July 28? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.