Highest temperature in NYC on July 4?

Platform comparison

Market context

The underlying real-world event is the daily high temperature recorded at LaGuardia Airport on 4 July 2026, which will determine the settlement of this prediction market. The crowd currently assigns a 0% probability to the "YES" outcome, implying near-certainty that the temperature will not fall within the specified range, despite historical data showing LaGuardia has reached 107°F on 3 July 1966[4]. Recent records also include a historic midnight temperature of 94°F at the same station, demonstrating that extreme heat events are not unprecedented in this location[2][5].

For traders, the primary catalysts to monitor are the National Weather Service hourly updates for LaGuardia and any sudden shifts in regional atmospheric pressure that could trigger heatwaves[1]. AccuWeather’s July 2026 forecast for the airport predicts daily highs between 81°F and 99°F, with overnight lows ranging from 68°F to 83°F, providing a baseline for expected conditions[7]. While no immediate weather announcements have been issued, traders should watch for whale flows in BTC and ETH futures markets, as macro volatility often correlates with speculative positioning in weather-linked prediction contracts, particularly when settlement involves USDC[7]. Exchange spot funding rates may also signal whether large capital is entering or exiting these positions ahead of the 2026-07-04 settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in NYC on July 4? 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.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.