Highest temperature in NYC on August 2?

Platform comparison

Market context

The outcome hinges on the single highest Fahrenheit reading recorded at LaGuardia Airport on 2 August, and the settlement source is Weather Underground’s KLGA daily history page. With the market currently pricing 0% for YES, the crowd is effectively saying a qualifying reading is extraordinarily unlikely, even though the contract only needs one daytime spike to land in the relevant range.[5][1]

Recent New York heat episodes show why traders usually anchor to airport readings rather than citywide narratives. On 2 July, LaGuardia reached 104°F in the middle of a regional heat wave, while Central Park logged 100°F the same day, reminding market participants that a one-site airport observation can run hotter than the more familiar Manhattan benchmark.[18][4] That makes this market sensitive to localised convection, humidity and timing, not just the broader “New York feels hot” backdrop.

For catalyst watching, the key inputs are the late-summer forecast cycle, any short-lived heat advisories, and whether afternoon temperatures can briefly overshoot the morning consensus before sea-breeze moderation sets in. Polymarket and Robinhood both reference KLGA/Weather Underground for this event, so settlement depends on the published daily maximum rather than what the city’s headline forecast suggests.[1][5] Crypto traders may also frame the move through broader risk sentiment: when BTC and ETH funding is elevated or spot is whippy, small-weather markets often trade more thinly and can gap on fresh forecast revisions rather than on fundamentals.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in NYC on August 2? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.