Highest temperature in Atlanta on July 27?

Platform comparison

Market context

The market seeks to identify which temperature bracket will contain Atlanta's highest reading on 27 July 2026, measured at Hartsfield-Jackson International Airport. The 0% crowd probability suggests traders are not backing any single range, indicating either genuine uncertainty about the settlement mechanism or insufficient liquidity to establish consensus pricing.

Atlanta's July temperatures cluster predictably around 88–92°F as daily highs, with extremes reaching into the mid-90s during heat waves. Historical data from the National Weather Service shows that temperatures exceeding 95°F occur in roughly one-third of July days during anomalously hot years, whilst readings below 85°F are rare. The airport station's microclimate—influenced by tarmac and urban heat—typically records 1–2°F higher than downtown measurements. Since the market resolves on actual recorded data from Wunderground's historical archive, the critical variable is whether summer 2026 develops typical seasonal patterns or deviates significantly.

Traders should monitor long-range forecasting models as July 2026 approaches, particularly whether the Atlantic hurricane season or persistent high-pressure systems establish themselves over the Southeast. The National Oceanic and Atmospheric Administration's seasonal outlooks, released quarterly, will signal whether anomalous heat is probable. Additionally, the specific range brackets offered in this market will determine where value concentrates; a market offering 88–91°F, 92–94°F, and 95°F+ ranges will price differently than one with tighter increments. Without visibility on those brackets, the 0% reading reflects incomplete information rather than genuine conviction that no temperature will be recorded.

Methodology

We track Highest temperature in Atlanta on July 27? 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 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.

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.

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.

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.