Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 86-87°F | 100% |
| 79°F or below | 0% |
| 80-81°F | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 88-89°F | 0% |
| 90-91°F | 0% |
| 92-93°F | 0% |
| 94-95°F | 0% |
| 96-97°F | 0% |
| 98°F or higher | 0% |
Market context
Atlanta’s high temperature on 1 August is being resolved off the Hartsfield-Jackson International Airport station, so the practical question is whether the day’s peak lands inside a narrow Fahrenheit band rather than whether the city feels broadly hot. August in Atlanta is usually warm to hot: one climate reference puts the average high for 1 August at 89.6°F, with a record high of 99°F for that date, while August-wide records show the city can still spike into the low 100s in stronger heat episodes.[1] That makes a 0% crowd-implied chance for the market’s YES side a sign of either a pricing mismatch or a view that the outcome bucket has been misread, because Atlanta’s early-August ceiling is normally well above the midsummer baseline.[1][2]
For context, recent late-summer extremes show Atlanta can still produce 95–100°F days in August, including a 100°F summer high in 2024 and a 95°F August high in 2025, so traders are usually watching whether synoptic heat or storm cover dominates the afternoon.[12][5] The key catalysts are the National Weather Service forecast cycle, any afternoon thunderstorm chances, and whether cloud cover or moisture suppresses peak heating below the upper-80s range; Polymarket notes that revisions to temperatures within the market window count until the first datapoint for the following date is published.[2] On access and regulation, German users face GlüStV constraints because online betting-style participation can be treated as gambling activity under German law, while US-facing venues may sit within CFTC scrutiny depending on how the contract is structured and marketed; that is separate from account onboarding, where “no-KYC up to $1,500” usually means small balances or withdrawals can remain usable without full identity verification, but larger activity may still trigger KYC checks and limits, narrowing access for some traders in this specific market.
Methodology
This overview of Highest temperature in Atlanta on August 1? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Tax UK has a different geo footprint.
- Do I need to KYC for Polymarket Tax UK?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Tax UK stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
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