Highest temperature in Atlanta on August 5?

Platform comparison

Market context

Polymarket is pricing this Atlanta airport temperature contract at a flat **0% YES** across the listed ranges, so traders are effectively saying the current on-chain market sees no live edge in any single outcome yet. On Polymarket, positions are bought with **USDC** on **Polygon**, and the winning conditional token pays out **$1** if the final Weather Underground reading for Hartsfield-Jackson Atlanta International Airport (KATL) lands in the selected Fahrenheit band.

For context, Atlanta’s early-August highs are usually well into the 80s or low 90s, which makes the market’s zeroed price unusual rather than a signal about the weather itself. AccuWeather’s August outlook shows daily highs around **89°F to 92°F** in the days immediately around 5 August, while Weather Spark’s August climate normals point to a hot, humid midsummer profile rather than a cool outlier.[2][13] That means the relevant historical comparison is not whether Atlanta gets hot, but whether the airport peak ends up clustered around the mid-80s or pushes into the upper-80s and above, where small forecast changes can flip the leading band.

A trader should watch the **National Weather Service Atlanta forecast**, any thunderstorm timing, and whether cloud cover or afternoon convection knocks the high down by a degree or two.[7][9] The market resolves on the final daily high published by Weather Underground for KATL, so the practical catalyst is the intraday forecast path, not the citywide average.[3][4] If the setup stays hot with limited rain risk, the upper bands gain; if showers arrive earlier than expected, the lower 80s become more plausible.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Atlanta on August 5? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 PolyGram. 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.

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%.