Highest temperature in Guangzhou on July 25?

Platform comparison

Market context

Guangzhou will experience peak summer heat on 25 July 2026, with the settlement hinging on the maximum temperature recorded at Baiyun International Airport Station. The market currently shows 0% implied probability across all temperature bands, suggesting either incomplete pricing or awaiting resolution data. Settlement occurs via Wunderground historical records at 12:00 UTC on the resolution date, with USDC payouts distributed to the winning band.

Guangzhou's July temperatures have historically clustered between 32–37°C, with extreme readings occasionally breaching 38°C during particularly intense heatwaves. The 2022 summer saw sustained peaks near 36°C across multiple weeks, whilst 2020 recorded a 38.9°C maximum in early August. The 0% crowd probability suggests traders may be awaiting confirmation of the specific temperature bands available for settlement, or the market has not yet attracted sufficient liquidity to establish meaningful odds. Historical volatility in South China's summer extremes typically correlates with the strength and positioning of the Pacific subtropical high-pressure system.

Traders should monitor China Meteorological Administration forecasts released in late June and early July, which provide 10–14 day outlooks for Guangzhou. El Niño or La Niña conditions, currently tracked by NOAA, influence regional precipitation and temperature patterns across southern China. Any tropical cyclone activity in the South China Sea during late July could suppress temperatures through cloud cover and moisture, whilst high-pressure dominance would drive readings toward the upper range. Real-time weather data from Wunderground becomes the binding source once the settlement window opens, making early-July forecast consensus critical for positioning.

Methodology

This page reads Highest temperature in Guangzhou on July 25? 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 are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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.