Highest temperature in Guangzhou on August 5?

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Market context

Guangzhou’s August heat is normally still in force, and the day’s *highest* reading at Baiyun Airport is what settles this market. Seasonal guides put August highs in the low 30s Celsius, with Guangzhou’s subtropical monsoon climate bringing heat, humidity and frequent rain rather than a sharp cool-down.[3][12][19]

That makes the current 0% yes pricing unusually low against the climate baseline, even allowing for day-to-day noise. Recent August forecast pages for Guangzhou cluster around highs of roughly 89–93°F, or about 32–34°C, with lows in the mid-to-high 20s Celsius.[1][6] Separate August guides also show typical highs around 33°C and regular rain, which can trim peaks but does not usually push the day’s maximum into unusually cold territory.[13][15]

For traders, the key variables are the airport station’s actual late-day maximum and the weather pattern over the next several hours, especially cloud cover, thunderstorms and rain bands that can cap heating. Wunderground’s settlement source is the Guangzhou Baiyun International Airport Station history page, so the market turns on that station’s reported daily high rather than city averages or app-based “feels like” values.[1] If broader crypto risk sentiment is relevant, watch BTC and ETH spot swings and funding, as sharp intraday moves can affect on-chain liquidity and the pricing of small USDC-settled contracts, but the weather outcome itself remains driven by local meteorology, not market flows.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Guangzhou on August 5? 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

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.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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.

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.