Highest temperature in Los Angeles on July 17?

Platform comparison

Market context

The market tracks the peak Fahrenheit reading at Los Angeles International Airport on 17 July 2026, a date currently seeing a heatwave with inland valleys hitting 96°F and deserts reaching 112°F[3]. While the crowd-implied probability for a specific outcome sits at 0%, the frontrunner is actually 80–81°F at 75%, suggesting the 0% figure likely refers to a different, less probable range or a misread of the full distribution[1]. Programmatically, a trader would script a scraper to pull hourly Wunderground data for KLAX, comparing the daily max against historical July 17 averages to identify arbitrage where the market underprices the likelihood of a coastal marine layer suppressing temperatures below 85°F.

Historical July 17 readings at KLAX typically cluster between 78°F and 84°F, framing the current 75% probability on 80–81°F as statistically grounded rather than speculative[1]. Programmatic evaluation requires checking the National Weather Service’s excessive heat watch status, as the current advisory for valleys and inland areas confirms the thermal gradient that usually keeps the airport cooler due to Pacific influence[3]. A bot would monitor the 12% probability on 78–79°F as a hedge against an unexpected marine intrusion, which historically occurs when high-pressure systems shift westward.

Traders must watch the 2–9 p.m. energy reduction schedules and cooling centre openings, as these indicate the severity of the heatwave and potential for record-breaking inland temperatures that could indirectly affect airport readings via atmospheric pressure shifts[4]. The catalyst is the official Wunderground daily max release, which resolves the market; a script should poll this endpoint every minute after 12:00 UTC on settlement day to capture the exact resolution value before the market closes[1]. Current conditions show 80°F with a RealFeel of 92°F, reinforcing the baseline for the 80–81°F frontrunner[2].

Sources: 1 · 2 · 3 · 4

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 Polymarket Review UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.