Highest temperature in Los Angeles on August 9?

Platform comparison

Market context

At Los Angeles International Airport, the day’s maximum temperature is the real-world datapoint that will decide this market, and on 9 August the observed high was effectively in the **80-81°F** band, which is why the contract sat near certainty rather than a coin-flip. The market is settled in USDC on-chain, but the key input is still the Weather Underground Daily Observations table for KLAX, not the higher-level daily summary, so traders are really pricing a specific station reading rather than a city-wide feel. [1][11]

The current **0% YES** crowd-implied probability is best read as a stale or mis-keyed framing relative to the observed weather pattern, because the same contract family has repeatedly tracked tightly around actual airport observations once the afternoon peak is in. Late-day temperature revisions can still matter if Weather Underground back-fills the station log before the next day’s first datapoint, but once that window closes the outcome is fixed by the published observation record. Comparable LA climate pages also show how quickly the airport can diverge from inland neighbourhoods, which is why station-specific settlement often beats broad “Los Angeles” forecasts. [1][2][5]

For traders, the main catalysts are the National Weather Service short-term forecast updates, any heat advisory language for coastal and inland zones, and the live KLAX observation stream as the afternoon peak passes. The broader macro overlay is usually light for a weather contract, but in crypto-native books, BTC and ETH volatility can still affect balance-sheet appetite and the willingness to warehouse late risk into settlement; when spot is calm and funding is neutral, these small event markets tend to trade more on data release timing than on direction. [9][10][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Los Angeles on August 9? 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.

UK Frequently Asked Questions

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.

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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.

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UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

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