Highest temperature in NYC on June 9?

Platform comparison

Active sub-markets

Market context

New York City's highest temperature on 9 June 2026 will be recorded at LaGuardia Airport and settled against Weather Underground historical data. The settlement window closes at midday UTC, meaning the final reading must be captured before noon on that date. This creates a technical constraint absent from some competing platforms: Kalshi's weather markets often settle on official National Weather Service reports released the following morning, whilst Polymarket's reliance on real-time Weather Underground snapshots introduces earlier closure risk for traders in US time zones.

Historical June temperatures at LaGuardia range from 59°F to 94°F across the past three decades, with a median high near 78°F. The 0% implied probability currently displayed reflects either extreme confidence in below-average conditions or sparse liquidity on this specific outcome range. Betfair and Smarkets typically show tighter spreads on weather markets with deeper order books, though their decimal odds format can obscure the actual probability gaps that Polymarket's percentage display makes immediately visible. The current crowd assessment suggests traders expect temperatures substantially below historical June norms, a positioning worth stress-testing against seasonal climate patterns and any anomalous weather systems forecast for early June 2026.

The National Weather Service Northeast Regional Office issues extended forecasts five to seven days ahead, with meaningful updates arriving by early June. Traders should monitor tropical system development in May and early June, as even distant Atlantic activity can suppress temperatures across the Northeast. Polymarket's fee structure (2% on both sides) versus Kalshi's flatter commission model may influence whether small-range bets justify execution, particularly if the probability drifts significantly from current levels as the settlement date approaches.

Methodology

We read Highest temperature in NYC on June 9? 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 quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

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). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Polymarket Alternative?

Zero. Polymarket Alternative routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Alternative triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.