Highest temperature in NYC on July 16?

Platform comparison

Market context

New York City’s LaGuardia Airport will record its peak temperature for 16 July 2026, with the market currently pricing a 60% chance that the high exceeds the 87°F threshold. This event sits within a broader East Coast heatwave that shattered records across a 500-mile corridor last week, breaking 14-to-154-year highs simultaneously in NYC, DC, and Atlantic City[3]. Such extreme clustering suggests the current 60% implied probability is grounded in a genuine shift in regional climatic behaviour rather than isolated variance.

Historical July peaks at KLGA often cluster between 85°F and 95°F, but the recent record-breaking week pushes the odds toward the upper bands, with 92–93°F now the frontrunner at 35% probability[1]. Traders comparing platforms should note that Polymarket displays this as decimal odds (roughly 1.67) while Kalshi or Betfair might frame it as 60% implied probability, affecting how risk is perceived across books. Fee structures and KYC requirements also diverge significantly: Polymarket remains largely non-KYC with lower fees, whereas Kalshi mandates full identity verification and Smarkets applies a commission on winnings, altering net returns even if the underlying probability aligns.

The primary catalyst remains the National Weather Service’s daily summary for KLGA, published via Weather Underground after 12:00 UTC on 17 July[2]. No further announcements are expected, as the settlement depends solely on the observed maximum temperature. Recent resolved markets, such as the 66–67°F low on 6 July 2026, confirm Weather Underground’s data is the definitive resolution source, with outcomes settling at 100% once verified[4]. Traders monitoring platform liquidity should watch for volume shifts as the settlement window closes, particularly if forecast models adjust overnight.

Sources: 1 · 2 · 3 · 4

Methodology

This page compares Highest temperature in NYC on July 16? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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. Robinhood Prediction Markets 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.