Highest temperature in NYC on August 3?

Platform comparison

Market context

The contract settles on the **highest temperature recorded at LaGuardia Airport** for 3 August 2026, so the key question is whether the day tops out in the low 80s, mid-80s, or higher before the first observation for 4 August is published. Polymarket’s live book has been clustering around **82–83°F** and **84–85°F**, with the wider temperature range still pricing a meaningful tail into the upper 80s, which is consistent with a late-summer city forecast rather than a runaway heat event.[1]

That 0% crowd-implied YES looks hard to square with the contract mechanics if the market is interpreted literally: on-chain settlement will pay in USDC to the range matching Wunderground’s final LaGuardia daily high, and the result is determined only after the date is complete and subsequent-day data is available.[4] Comparable New York August days usually resolve in the low-to-mid 80s rather than extreme heat, and recent climate monitors for the city have also printed highs around 83°F, which makes the leading bands in the market look more plausible than deep out-of-the-money outcomes.[8]

For traders, the main catalysts are the **official weather observations**, any late-day convection or sea-breeze shift, and whether Wunderground revises the final daily summary before the next day’s first datapoint appears.[1][4] On the crypto side, the contract is a short-dated USDC settlement event, so it tends to trade more like a realised-data binary than a macro bet; BTC and ETH funding, spot volatility, or whale flows matter only insofar as they affect overall risk appetite and cross-market liquidity rather than the weather outcome itself.

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

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.

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.

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.

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.