Pronóstico: Highest temperature in Los Angeles on August 14?

Platform comparison

Market context

Polymarket has this contract pinned at 0% YES, so the board is treating a sub-transaction, low-probability outcome as fully discounted. The real-world event is the highest temperature at Los Angeles International Airport on 14 August, resolved from Weather Underground’s Daily Observations table rather than the day-high summary, which matters because the market settles on the temperature band containing the peak reading and the contract is cash-settled in USDC via Polygon conditional tokens.

Historically, LAX in mid-August usually sits in the 70s to mid-80s Fahrenheit, with brief pushes higher when offshore flow or regional heat builds. Recent station history already showed 79°F at 11:35 am PDT on 14 August, with earlier readings in the high 60s and low 70s, so the live trade is about whether the day’s maximum clears the lower bands before the afternoon marine layer and sea breeze rebuild.

The main catalysts are the intraday observation cadence and any shift in the local forecast from the National Weather Service, especially if a heat advisory or an onshore breeze changes expected afternoon highs. Traders watching the book should focus on the KLAX station feed, because the settlement source is the observed daily table itself: if that table prints a higher late-day value than the summary box, only the table controls the outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Los Angeles on August 14? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Qué Es. 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'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.

Do I need to KYC for this market?

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