Highest temperature in Los Angeles on August 17?

Platform comparison

Market context

Los Angeles International Airport was already running warm on 17 August, with the National Weather Service showing mid-70s Fahrenheit through the afternoon and a station maximum around 75.9F by early afternoon, while Weather Underground-style daily observation data would still need to be checked for the final settlement figure. That makes a 0% yes probability look consistent with a market that is effectively waiting for the day’s actual high, not the rounded headline value, to confirm whether the result falls into the quoted range.

Historically, LAX’s August highs tend to sit in the mid-70s, and the monthly climatology for the station puts average maximum temperatures around 77.7F, with the highest observed August value on record much higher but rare. In practical terms, that means traders should treat anything near the upper 70s as a meaningful upside relative to normal, but not as the base case unless a late-day warming surge develops. The early reading pattern also fits a day that can still finish a few degrees above the morning and early afternoon values if the marine layer clears more slowly than expected.

The main catalyst is the afternoon evolution of the coastal marine layer and whether clearing allows temperatures to push beyond the mid-70s before the diurnal peak passes. The National Weather Service had also highlighted heat across parts of Southern California in mid-August, but the airport station itself is usually moderated by onshore flow, so the key dependency is the local LAX observation sequence rather than broader Los Angeles County heat headlines. Final settlement should therefore track the highest value in the daily observations table for the station, not the summary high/low display.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Los Angeles on August 17?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

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