Highest temperature in Chongqing on August 10?

Platform comparison

Market context

Chongqing Airport is likely to post another very hot August reading, with commercial forecast pages for 10 August pointing to highs around 34–35°C and the broader city climate profile showing August as the hottest month of the year. AccuWeather’s Chongqing forecast shows 95°F/79°F for 10 August, while other climate references put the city’s August average maximum near 34°C and note that extreme peaks can run well above 39°C in strong heat events.[1][8][12][18]

That context helps explain why the current 0% YES implied by the market appears disconnected from the weather backdrop rather than from a genuinely cold seasonal pattern. On Polymarket, the contract is priced as a 0–100% implied probability and the front outcome is shown directly in percentage terms; on Betfair and Smarkets, the same view is usually read through decimal odds, so a short-priced favourite can look less stark even when the underlying probability is similar. Fee treatment also differs materially: Polymarket’s headline price is not directly comparable with exchange-style commissions, while Betfair and Smarkets deduct fees from winnings and may narrow the effective edge for frequent trading.

The main catalysts are the live forecast updates, any late-day convective rain or thunderstorm timing, and the actual station observations before the settlement window closes. AccuWeather’s day forecast currently allows for “a couple of thunderstorms” on 10 August, which matters because cloud cover and precipitation can suppress the day’s maximum even in a hot regime.[13][15] Traders should also watch the resolution mechanics closely: this market settles off the Daily Observations table for Chongqing Jiangbei International Airport Station, not the summary “Day High & Low” figure, so a late revision in the station log can matter more than the headline forecast display.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Chongqing on August 10? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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.

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.

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. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

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.