Highest temperature in Atlanta on August 1?

Platform comparison

Market context

Polymarket’s contract on Atlanta’s 1 August high is pricing **86-87°F** as the leading outcome at **31%**, with the market still spread across the mid-80s rather than leaning to an outright heat spike. For a Polymarket user, that means buying conditional tokens on Polygon with USDC is currently a bet on a fairly tight distribution, not a blowout summer-heat scenario; the market resolves off the highest temperature recorded at Hartsfield-Jackson International Airport Station on that calendar day, using Wunderground’s daily history page.[2]

The historical frame is consistent with that cautious pricing. Atlanta’s August 1 record high in the long-run city climate set is **99°F**, while typical early-August highs are in the upper 80s, which makes the current mid-80s cluster look more like a normal hot day than an extreme one.[1] Recent climate summaries also show Atlanta can still reach the mid-90s in August, but the strongest heat often arrives on a different date, underscoring how weather into one specific afternoon can miss the month’s broader peak.[5][13]

Traders should watch the forecast evolution into the final hours before the settlement window closes, especially cloud cover, humidity, and any afternoon thunderstorms that can cap the maximum temperature around the airport. Polymarket itself notes that revisions to temperature observations within the market’s window are considered only until the next day’s first datapoint is published, so the final print matters more than intraday swings.[2] Weather-market pricing can move quickly if the National Weather Service shifts its expectation or if convective activity develops over metro Atlanta late in the day.[12]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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

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.

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.

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