Highest temperature in Guangzhou on August 1?

Platform comparison

Market context

Guangzhou’s 1 August high will be judged against the day’s maximum at Baiyun International Airport, so the key question is whether the station logs a notably hot afternoon reading before the 12:00 UTC settlement cut-off. August in Guangzhou is normally very warm and humid, with average highs clustered around 32-33°C and frequent rainfall, but historical August extremes can run much hotter, including days in the high 30s°C. [1][6][15][17]

That context makes the current 0% yes price look less like a view on climate and more like a pricing artefact: on comparable August days, published climate pages and historical summaries place Guangzhou’s typical high well above the lower temperature bands, while rare heat spikes are possible when the city sits under clear skies between monsoon bursts. [1][6][10][12][17] On Polymarket, the market price is usually read as an implied probability; on Kalshi, the same event is quoted in dollars and cents against a $1 payoff; on Betfair and Smarkets, traders are usually comparing decimal prices and effective net odds after commission, which matters if a tight range is being traded. KYC access also differs by venue, so the same weather view can be tradable on one platform but not another depending on jurisdiction and verification rules.

For catalysts, traders should watch the local forecast evolution, especially cloud cover, rainfall timing and whether afternoon convection suppresses the peak temperature; Guangzhou’s August weather is often humid and storm-prone, so a sunny spell can lift the reading quickly while showers can cap it. [9][15][17] The most important dependency is the actual Wunderground station history page used for settlement, because the market resolves from the recorded maximum rather than a citywide forecast. [1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Guangzhou on August 1? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.