Highest temperature in Atlanta on May 22?

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Market context

Atlanta’s airport high for 22 May is shaping up as a low bar case, with the market pricing 0% for a YES outcome and making the implied favourite the cooler range. That leaves the underdog side concentrated around values above the consensus expectation, but only if the day overperforms the current guidance. The practical read is that traders are assuming a modest, spring-like top end rather than an early-summer spike.

The historical frame points the same way. Late May in Atlanta usually produces highs in the low 80s Fahrenheit, and WeatherSpark puts typical daily highs for the month rising from about 76F to 83F, with values rarely above 90F. Polymarket’s own Atlanta temperature markets have recently clustered very tightly around the forecasted top range, which suggests consensus often follows the National Weather Service rather than reaching for outsized heat. Against that backdrop, the market looks like a favourite in the cooler band and an underdog only if the day runs materially warmer than the usual May pattern.

The main catalyst is simply the final daytime maximum at Hartsfield-Jackson before the 12:00 UTC settlement cut-off, so the overnight and early-morning evolution matters more than later afternoon heating. The current NWS outlook cited in market feeds pointed to a high near 83F–85F under mostly cloudy skies with scattered afternoon showers, which would cap upside unless cloud cover breaks earlier than expected. Traders should watch the latest Atlanta forecast updates, any change in cloud cover or thunderstorm timing, and whether the airport observation trend is tracking above the forecast late in the morning. If the guidance holds, the value remains with the cooler consensus rather than the warmer tail.

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). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.