Highest temperature in Chongqing on August 11?

Platform comparison

Market context

Chongqing will experience peak summer heat on 11 August 2026, with the highest temperature recorded at Jiangbei International Airport Station determining the settlement outcome. The market uses Weather Underground's Daily Observations table as the binding resolution source, a specification that matters because the platform's summary figures occasionally diverge from granular hourly data—a distinction that has triggered disputes on competing books when weather stations report conflicting readings.

Chongqing's August temperatures typically range between 32–38°C, though extremes have reached 40°C during particularly intense heat waves. Historical August records show the city experiences consistent afternoon peaks between 14:00 and 16:00 local time, with humidity often exceeding 70 per cent. The 0% crowd probability across prediction markets suggests traders are either awaiting range clarification or treating this as a placeholder market pending full option availability. Kalshi's decimal odds format and Polymarket's implied probability display will frame this differently for users comparing platforms; Betfair's commission structure (typically 5%) also affects break-even thresholds compared to Smarkets' lower fees on weather contracts.

Traders should monitor China Meteorological Administration forecasts released in early August, which typically provide 10-day outlooks by late July. El Niño or La Niña patterns influence regional heat distribution, and any tropical cyclone activity in the South China Sea could suppress temperatures. Weather Underground's station maintenance schedules and any sensor recalibrations should be tracked, as these occasionally affect historical comparisons and can shift settlement outcomes if equipment changes occur near the resolution window.

Methodology

This page compares Highest temperature in Chongqing on August 11? 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 Kalshi Alternative, 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

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.

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.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

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.