Highest temperature in NYC on July 30?

Platform comparison

Market context

LaGuardia’s hottest reading on 30 July 2026 will decide this market, and the current crowd-implied probability of **0% YES** leaves the obvious favourite as a sub-88°F outcome unless a genuine heat spike arrives before the settlement window closes. For a handicapper, that is a very short-priced underdog setup in reverse: consensus is effectively pricing a cooler day, while any move into the low-to-mid 90s would create the only meaningful value in the higher-temperature ranges.

New York’s late-July climate normally supports warm, humid afternoons rather than routine extreme heat, with typical highs in the mid-to-upper 80s and occasional surges into the 90s during hot spells.[1][8][10][14] Historical July 30 weather notes for New York show that the date can produce notably warm outcomes, but it is not a guaranteed heat-wave slot, which is why the market’s near-zero YES price appears to assume a fairly ordinary summer pattern rather than a standout thermal event.[2][15] The contrarian angle is straightforward: if synoptic patterns turn stagnant, a strong Bermuda High-style setup or a stalled front can push airport temperatures well above normals, and that is where the range above the consensus becomes the value pocket.

Traders should watch the National Weather Service and any updated NYC-area forecast discussion for heat advisories, forecast highs, and cloud-cover changes, because airport temperatures can overshoot or undershoot city-centre expectations depending on wind direction and marine influence.[3][5][18] LaGuardia is especially sensitive to onshore flow and afternoon timing, so the key dependency is not just the city forecast but whether the airport stays under coastal moderation during peak heating. With settlement keyed to the highest reading at LaGuardia, late-morning trend updates and same-day radar/forecast revisions matter more than broad monthly averages.[3][5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in NYC on July 30? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.