Highest temperature in Los Angeles on July 20?

Platform comparison

Market context

Los Angeles recorded its highest temperature on 20 July 2026 at the Los Angeles International Airport Station, with the market settling on the 80–81°F range as the definitive outcome. This resolution contradicts the initial crowd-implied probability of 0% for any YES outcome, reflecting a sharp correction in trader sentiment as historical July data and real-time weather feeds aligned with warmer expectations. The contract settles in USDC on-chain, with final payout determined by Wunderground’s official daily record for KLAX, ensuring transparent, auditable settlement tied to verified meteorological data.

Historical July temperatures in Los Angeles County typically peak around 29°C (84°F), with lows near 19°C (66°F), making the 80–81°F outcome well within seasonal norms [2]. Comparable cases include the 74–75°F reading on 4 July 2026, which the market correctly priced and resolved, demonstrating the platform’s ability to track short-term weather trends accurately [3]. The current frontrunner at 100% probability for 80–81°F suggests traders have fully incorporated regional heat patterns, overriding earlier skepticism about extreme warmth.

Traders should monitor daily Wunderground updates for KLAX and watch for regional heatwave announcements from California emergency services, as these often precede temperature spikes [4]. While no direct crypto macro catalysts tie to this weather contract, whale flows into USDC-based prediction markets on btc-prediction.bet may signal broader risk appetite shifts. Funding rates on BTC/ETH perps remain neutral, suggesting no immediate leverage-driven distortion in prediction market liquidity. For real-time weather validation, Wunderground’s KLAX history page remains the primary resolution source.

Sources: 1 · 2 · 3 · 4

Methodology

This page reads Highest temperature in Los Angeles on July 20? 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.

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.

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.