Highest temperature in NYC on July 7?

Platform comparison

Market context

The underlying event is a single-day temperature record at LaGuardia Airport on 7 July 2026, where the market resolves if the peak heat exceeds the implied threshold. Current crowd-implied probability sits at 4% YES, suggesting traders view an extreme spike as highly unlikely given the settlement window ending 12:00 UTC on 7 July 2026.

Historical precedents frame this low probability sharply. In early July 2026, LaGuardia hit 104°F on 2 July, surpassing its 1966 daily high of 101°F, while a separate record saw 102°F on 4 July with a midnight temperature of 94°F, breaking the 2013 record of 93°F[1][2][3]. Despite these recent extremes, the 4% figure implies the market expects a return to normalcy, as July 2026 forecasts typically range from 81°F to 99°F with overnight lows between 68°F and 83°F[6]. The recent 103°F peak on 4 July remains the upper bound of observed volatility, making a further jump beyond current expectations statistically marginal.

Traders must monitor real-time Wunderground data for LaGuardia and any sudden shifts in the flood watch, which could suppress temperatures via heavy rain[9]. The NWS currently favours a 72–75°F bracket with a point high near 73°F, directly contradicting the extreme heat scenario[9]. No major weather announcements are scheduled, but whale flows in BTC/ETH macro markets could indirectly influence liquidity if USDC settlement volumes surge on-chain. Recent American Weather data confirms the 103°F peak on 4 July as the maximum 1-day mean for the period, reinforcing the view that the 4% YES probability is well-calibrated to the observed ceiling[8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in NYC on July 7? 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 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.

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.