Highest temperature in Los Angeles on August 17?

Platform comparison

Market context

Los Angeles airport on 17 August sits in a weak weather market for the top temperature range, with the crowd at 0% for YES and the implied consensus effectively saying the day will not reach the higher bands. At KLAX, Weather Underground’s history page shows a peak of 76°F and a low of 66°F for the date, which would place the outcome comfortably in the lower ranges if that level holds through the full observations table.[2]

The historical frame favours caution on the upside rather than a chase for heat. Late-summer Los Angeles often prints warm, but coastal influence at the airport keeps extremes muted versus inland parts of the county, and long-run August averages cluster in the mid-80s rather than the 90s.[1][4][12] That makes the favourite the cooler range, while a contrarian case for a hotter band depends on a late-afternoon surge that lifts the final Daily Observations maximum above what was already recorded early in the day.[2][12]

The catalyst is the intraday evolution of the Daily Observations table, not the Day High & Low summary, so traders should watch the timestamped airport readings rather than headline forecasts. The National Weather Service had flagged a warming trend in Southern California around 17 August, with heat peaking later in the week in inland areas, but the immediate coast remained much less exposed than the valleys and deserts.[8][10][13] That leaves the main value angle with the underdog side in the lower temperature bucket, unless the airport sees an unexpected late spike.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Los Angeles on August 17? 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 Who Will Win 2026. 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 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 Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.