Highest temperature in Los Angeles on August 17?

Platform comparison

Market context

The market seeks to identify the single highest temperature reading recorded at Los Angeles International Airport on 17 August 2026, with settlement determined by Weather Underground's Daily Observations table rather than summary figures. The crowd currently assigns zero probability to any outcome occurring, suggesting either extreme confidence in a particular temperature band or genuine uncertainty about which range will capture the day's peak.

Los Angeles in mid-August typically experiences highs between 75°F and 85°F at the airport station, though readings occasionally exceed 90°F during heat waves. Historical August data from LAX shows that temperatures above 95°F occur roughly once every five to seven years during this month, whilst readings below 70°F are exceptionally rare. The 0% implied probability across all ranges indicates the market has not yet crystallised expectations, leaving substantial room for value once meteorological forecasts narrow the likely range as August 2026 approaches.

Traders should monitor extended-range weather models from late July onwards, as these typically gain reliability within two weeks of the target date. Pacific high-pressure systems and any tropical moisture incursions from the south will be the primary drivers of temperature extremes. The National Weather Service's official forecast, issued around 5–7 days before 17 August, will provide the most actionable signal for positioning, though airport-specific microclimatic factors—including marine layer influence and urban heat effects—can produce readings 3–5°F above or below broader regional predictions.

Methodology

This page reviews Highest temperature in Los Angeles on August 17? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

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. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.