Highest temperature in Beijing on August 10?

Platform comparison

Market context

Beijing’s afternoon temperature on 10 August will be judged from the Weather Underground **Daily Observations** table for Beijing Capital International Airport, so the relevant number is the highest verified reading in that table rather than any headline “day high” summary. At 8am UTC on the settlement day, the market is already set against a typically hot mid-August backdrop: Beijing’s August average highs are around 30–31°C, and historical guides put 10 August near the low-30s in Celsius, which makes the market’s 0% YES pricing look inconsistent with climate norms rather than an obvious reflection of a cold-season anomaly.[1][6][17]

Comparable traces also matter here because the market is resolving a single daily maximum, not a full-day average. Public weather archives for Beijing show that August highs commonly cluster in the low 30s, with recent 9–10 August readings often around 31–34°C, and Weather Underground’s own Beijing history page lists a record high near 95°F and an average high around 88°F for the city, reinforcing that the threshold bands are usually decided by one warm afternoon spike rather than a stable all-day level.[9][14][15][18] On Polymarket, the same event is quoted in implied probabilities, while Kalshi-style books are typically easier to compare in direct contract terms; Betfair and Smarkets instead surface decimal odds, which can make small changes in late-session expectation shifts easier to read, but fees and market access differ materially by venue.

The main catalysts are the forecast updates and any intra-day revisions to the underlying station observations before the first datapoint for 11 August is published. Polymarket’s own event page notes that revisions within the market window count until the next day’s first datapoint appears, which is the key operational detail for a weather market like this one.[16] For traders comparing books, that also matters because KYC reach and withdrawal constraints differ: Kalshi is US-focused, while Betfair and Smarkets generally use odds-based interfaces and platform-specific commission schedules, so the same weather view can look meaningfully different after costs even when the underlying Beijing forecast is unchanged.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Beijing 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.

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.

Which platform supports Klarna/SOFORT?

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