Highest temperature in Los Angeles on July 9?

Platform comparison

Market context

The highest temperature recorded at Los Angeles International Airport on 9 July 2026 will determine the outcome of this weather contract, with the market currently pricing the "67°F or below" range at a near-zero 0.3¢ per share, while the "74–75°F" bracket dominates at 56% probability[1]. This pricing reflects the on-chain mechanics of Polymarket, where conditional tokens are traded using USDC on the Polygon network, and the current frontrunner aligns with the seasonal norm rather than an anomaly.

Historical data frames this low probability for cooler outcomes, as AccuWeather forecasts daily highs in Los Angeles for July 2026 to range between 79°F and 90°F, with an average high of 85°F[3]. Recent market behaviour supports this; the 7 July 2026 contract saw the "74–75°F" outcome settle at 100% probability, confirming that mid-summer temperatures in this region consistently exceed the 67°F threshold[2]. Traders should view the current 0% implied probability for the cool range as a rational reflection of these comparable cases.

The primary catalyst for any deviation is the local weather schedule, specifically the National Weather Service's daily climatological reports which serve as the official resolution source for similar markets[5]. While no specific announcements are pending for 9 July, traders must monitor real-time updates from 23ABC Morning Weather, which covers Kern County and broader California conditions that could influence LA temperatures[6]. The market's dependency on Wunderground data means any significant cloud cover or marine layer intrusion reported in these updates would be the only plausible driver to shift odds away from the dominant 74–75°F consensus[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Kalshi 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.

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.

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.

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.