Highest temperature in NYC on July 12?

Platform comparison

Market context

New York City is currently enduring an unprecedented heat wave, with LaGuardia Airport (KLGA) recording a record-breaking 104°F on July 3, 2026, shattering the 1966 high of 101°F[3]. This extreme event has pushed midnight temperatures to 94°F, the highest ever observed at the station, indicating a persistent thermal anomaly across the East Coast that has killed dozens in neighbouring states[2][4]. The crowd-implied probability of 0% for the current market suggests traders are betting the temperature on July 12 will fall outside the specific range offered, likely anticipating a return to the monthly average highs of 73°F to 91°F rather than another record-shattering spike[5].

Traders should monitor the National Weather Service’s daily climate reports for KLGA and Wunderground’s real-time hourly data as the settlement window approaches on 12 July 2026[1][9]. While the current heat wave is unprecedented, historical climate normals suggest a 86°F maximum for mid-July, making a repeat of the 104°F peak statistically improbable without a new atmospheric driver[9]. The market resolves in USDC on-chain, with settlement tied directly to the official Wunderground reading for the day’s highest temperature, meaning any discrepancy between forecast models and the actual station log will determine the outcome for BTC and ETH holders using the platform.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

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

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.

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.

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.