Highest temperature in Guangzhou on July 9?

Platform comparison

Market context

The real-world event centres on the highest temperature recorded at Guangzhou Baiyun International Airport on 9 July 2026, with the market currently pricing a 0% chance of the temperature falling into the implied “YES” range. Historical data shows early July in Guangzhou typically sees daily highs between 31°C and 34°C, based on China Meteorological Administration station records[4]. July is Guangzhou’s hottest month, with the highest daily average high reaching 91°F (33°C) on 25 July, while lows rarely dip below 77°F (25°C)[1]. The 2024 summer in Guangzhou was the hottest since 1961, with an average July temperature of 23.2°C, suggesting a trend of intensifying heat waves across southern China[2].

Traders should monitor official heatwave announcements from the Guangdong Meteorological Bureau and any scheduled weather model updates from Wunderground, the designated resolution source[3]. Recent reports confirm Guangzhou has broken a three-decade heat record, with 235 summer days measured by temperature as of mid-July 2026, indicating sustained high-pressure conditions[8]. Platform comparisons reveal key divergences: Polymarket uses decimal odds and lower fees with minimal KYC, whereas Kalshi requires full US KYC and uses implied probability pricing, while Betfair and Smarkets operate on traditional odds with higher commission structures. These differences affect liquidity and risk exposure for this specific weather event, particularly where resolution depends on third-party data like Wunderground[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Guangzhou on July 9? 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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

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.

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.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative 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.