Highest temperature in Atlanta on August 1?

Platform comparison

Market context

Atlanta’s highest temperature on 1 August will be the day’s peak reading at Hartsfield-Jackson, not the city’s broad monthly average, so the practical question is how hot the airport gets before cloud, rain or sea-breeze-style moderation cuts off heating. August in Atlanta is normally hot and humid, with average highs around 89.6°F on 1 August and a record high for that date of 99°F in the long-run climate table, which places this market firmly in a summer heat regime rather than an extreme-heat one.[1]

The current 0% YES crowd price implies the market is effectively assuming a near-impossible outcome, which is hard to reconcile with both historical August behaviour and the live framing on adjacent temperature markets. Recent market commentary for the same event points to a mid-80s to high-80s forecast band, with trader attention on partly cloudy skies, light southerly flow and the possibility of afternoon thunderstorms limiting the maximum.[2] For programmatic traders, that means modelling not just the headline forecast high, but the probability of a late cloud build-out or convective cap that keeps the final airport observation one or two degrees lower than the ensemble median.[2]

The main catalysts are the short-range forecast updates, mesoscale thunderstorm timing, and the exact airport observation sequence on Wunderground, since settlement depends on the highest recorded value before the next day’s first datapoint is published.[2] Daily climate context also matters: Atlanta’s August heat can run above the seasonal norm when synoptic ridging strengthens, and recent climate summaries show the city still printing highs near 95–100°F in summer even without exceptional heatwaves.[5][12] For a bot or conditional-order workflow, the useful triggers are forecast revisions in the final 24–48 hours, convective outlook changes, and any shift in cloud cover or dew point that moves the expected daily ceiling across a temperature bucket.[2][5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Atlanta on August 1? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Bot UK. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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