Highest temperature in Los Angeles on July 9?

Platform comparison

Market context

The real-world event in question is the peak daily temperature recorded at Los Angeles International Airport on 9 July 2026, a date historically prone to significant heat in Southern California. Current crowd-implied probability for a "YES" outcome on the lowest temperature range sits at 0%, reflecting a near-universal consensus that temperatures will far exceed the 67°F threshold. This stark divergence from the zero probability is notable when compared across platforms: Polymarket assigns a 56% chance to the 74–75°F range, while Lines.com favours 76–77°F with a 43% probability, and AccuWeather forecasts daily highs between 79°F and 90°F for July 2026[1][3][7].

Historical precedents frame this current pricing, particularly the recent major heat wave in March 2026 that saw temperatures soar 25 degrees above normal across the region, smashing records in Los Angeles[5]. Such extreme anomalies suggest that a 0% probability for the lowest range is mathematically sound, as even the "coolest" July days in LA typically hover near 75°F, with the July 7, 2026 market settling at 100% for the 74–75°F range[2]. Traders should monitor upcoming weather model updates and any announced heat advisories from local authorities, as these serve as primary catalysts for temperature spikes. Recent reporting from the Los Angeles Times highlights the volatility of SoCal heat patterns, reinforcing the need to track real-time meteorological data rather than static seasonal averages[5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.