Highest temperature in NYC on August 11?

Platform comparison

Market context

New York City's peak temperature on 11 August 2026 will be recorded at LaGuardia Airport and measured against historical August benchmarks. The current 0% crowd probability suggests either extreme confidence in a specific temperature band or minimal trading volume on this particular resolution window. LaGuardia's August daily highs typically range between 78–86°F, with the station's all-time August record standing at 102°F set in 1933. The 0% reading warrants scrutiny: on Polymarket, such extremes often reflect thin liquidity rather than genuine market consensus, whereas Kalshi's tighter regulatory framework and higher minimum order sizes can produce starker probability gaps when order books lack depth.

Historical August temperature distributions at LaGuardia show that readings above 95°F occur roughly once per decade, whilst sub-75°F highs are exceptionally rare. The National Weather Service's 30-year climate normals place the median August high at approximately 82°F. Traders should monitor the Climate Prediction Center's seasonal outlook and any tropical system forecasts issued in early August 2026, as Atlantic hurricane activity can suppress temperatures through cloud cover and precipitation. Kalshi's fee structure (0.2% maker/taker) differs materially from Polymarket's variable fees, affecting breakeven thresholds on narrow temperature bands. Betfair's decimal odds format may obscure probability shifts that appear clearer on Smarkets' fractional presentation, particularly relevant if the market's probability moves off zero.

Methodology

We read Highest temperature in NYC on August 11? 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.

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.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

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.