Highest temperature in Chongqing on August 4?

Platform comparison

Market context

Chongqing’s **highest temperature** for 4 August is usually set by late-afternoon heat rather than the overnight low, and August is typically the city’s hottest month. Long-run climate guides put Chongqing’s August average high around **34°C**, with typical daily highs in the low-to-mid 30s and occasional extreme spikes above **39°C**, so a reading at the airport station above the low-30s is the historical baseline rather than an outlier.[1][5][7][12]

That helps explain why the market’s **0% YES** crowd price is not a forecast of impossibility, but more a sign that traders have not yet priced in a qualifying hot-day outcome at the settlement station. On Polymarket and Kalshi, this sort of weather contract is usually shown as an implied probability, while Betfair and Smarkets present a price/odds style book and can feel tighter or looser depending on liquidity and fees; for a short-dated temperature market, the practical gap often comes from whether traders see the event as already locked in by the day’s heat profile or still vulnerable to cloud, rain, or cooler air mass changes.

For this specific contract, the key catalyst is the **same-day afternoon maximum** at Chongqing Jiangbei International Airport, because the settlement source is Wunderground’s daily history page for that station. At 10:00 UTC on 4 August, traders will be watching the live forecast and whether the airport actually gets the strongest heating window before local sunset, with any rain band or reduced sunshine lowering the ceiling; recent reporting has also described Chongqing residents sheltering from heatwave conditions, which supports the view that elevated readings remain plausible even if the exact peak is still data-dependent.[19][1][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Chongqing on August 4? 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

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.

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.

Which platform supports Klarna/SOFORT?

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