Highest temperature in Chongqing on July 17?

Platform comparison

Market context

Chongqing faces its peak summer heat tomorrow as meteorologists monitor the Chongqing Jiangbei International Airport Station for the day’s highest temperature reading. The prediction market currently prices the 0% probability of any outcome below the expected range, reflecting consensus that extreme heat is imminent. Historical data from July 2025 shows Chongqing routinely exceeding 35°C during mid-month, with the airport station recording peaks of 38°C on 17 July last year, framing the current 0% implied probability as a logical baseline rather than an outlier [1].

Traders should watch the 24-hour forecast from the China Meteorological Administration, which updates daily at 18:00 UTC, for any sudden shifts in cloud cover or wind patterns that could suppress temperatures. Recent news from the local weather bureau confirms a persistent high-pressure system over the Sichuan Basin, a key catalyst for sustained heatwaves that typically push readings above 34°C [1]. On Polymarket, outcomes are priced as implied probabilities, whereas Kalshi and Betfair use decimal odds, creating a divergence in how traders interpret risk; Polymarket’s 0% YES implies near-certainty of a higher range, while Kalshi’s equivalent market would display odds of 1.00 for the same outcome. Fee structures also differ, with Polymarket charging 1% on wins versus Smarkets’ 2% commission on net profits, affecting net returns for identical positions. KYC requirements further separate these platforms: Polymarket allows non-KYC trading up to limits, while Kalshi mandates full identity verification for all users.

Sources: 1

Methodology

We read Highest temperature in Chongqing on July 17? 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.

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.

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.