Highest temperature in Atlanta on August 1?

Platform comparison

Market context

Atlanta’s 1 August maximum at Hartsfield-Jackson is a mid-80s to low-90s print rather than a true heat-extreme, so the crowd’s 0% YES reading on the market title is best treated as shorthand for a specific bucket being mispriced, not as a view that the day cannot get hot. Atlanta’s August 1 record high is 99°F, while the long-run average high for that date is 89.6°F, which places the centre of gravity well above the low-80s ranges and leaves the **favourite** cluster around the upper-80s outcomes if the day runs warm and dry.[1] Current market pricing on the linked event shows **86-87°F** as the frontrunner at 31%, with **82-83°F** next at 22%, so consensus is leaning cooler than climatology would normally suggest.[2]

On a handicapper’s read, that sets up a clear contrast between the crowd’s consensus and the historical baseline: the **underdog** is the hotter band, while the apparent **value** sits where Atlanta’s August climatology most often lands — the upper-80s, especially if morning cloud cover burns off and thunderstorms stay delayed.[1][3] Forecast products for Atlanta’s August profile point to daily highs generally in the 86°F to 92°F range, which keeps the market anchored near the 86-89°F buckets rather than the lower bins.[3] That makes any sub-84°F outcome more dependent on an overcast or rain-interrupted day than on the city’s normal summer pattern.[9]

For traders, the key catalysts are the day’s timing of cloud cover, convection and any late-afternoon thunderstorms, because those are the main mechanisms that can cap the airport high below the consensus zone.[2][9] There are no scheduled policy or event catalysts here; the market will mostly track how the local forecast evolves into the final hours before the settlement window closes. In practice, the sharper angle is whether the airport gets enough early sun for a clean rise into the upper 80s, or whether convective debris limits the peak and protects the cooler buckets.[2][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

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. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.