Highest temperature in Los Angeles on July 12?

Platform comparison

Market context

Los Angeles faces a scorching July 12, 2026, with the highest temperature at the International Airport Station set to determine the outcome of a weather prediction contract. On Polymarket, this contract trades at 0% probability for the YES outcome, implying the crowd believes the temperature will fall outside the specified range, despite long-term averages suggesting July highs often reach 85°F to 92°F in the region[4]. Historical data shows July 12 typically sees maximums around 89°F, yet recent extreme heatwaves in Southern California have shattered records, with temperatures soaring 25 degrees above normal in March 2026 and parts of the San Fernando Valley exceeding 110°F during a July heat event[2][7].

Traders monitoring this on-chain market should watch for official heatwave announcements from local authorities and real-time updates from Wunderground, the designated resolution source for KLAX station data. Recent news highlights active cooling centres and energy-saving advisories as the region braces for summer’s first major heat wave, with forecasts indicating temperatures could skyrocket above 100°F[2]. The market resolves based on the highest recorded temperature for all times on 12 July 2026, settled in USDC on the Polygon network using conditional tokens, meaning liquidity and price movements will depend entirely on incoming weather data rather than abstract speculation.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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

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.

Do I need to KYC for this market?

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