Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live 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
The event is the highest temperature observed at Hartsfield-Jackson Atlanta International Airport on 1 August 2026, measured in Fahrenheit and resolved against the day’s peak reading on Wunderground. Atlanta’s early-August climate is normally hot rather than extreme: the long-run average high for 1 August is about 89.6°F, while the record high for that date is 99°F, so outcomes cluster in the upper 80s to low 90s unless cloud cover or thunderstorms hold the airport down.[1]
That makes the current 0% YES crowd signal look less like a view on the weather itself than a reflection of market structure or listing frictions. Comparable aviation-station temperature markets often settle in fairly tight bands because airport readings are hourly and localised, and recent forecasting for Atlanta has pointed to highs in the mid-80s to low-90s range, which is consistent with the kind of spread typically seen in late-summer temperature books.[2][3] For regulatory context, German-accessible prediction markets are constrained by the Glücksspielstaatsvertrag (GlüStV) framework, while US-facing temperature contracts can fall within the Commodity Futures Trading Commission’s wider reach if they are offered to US persons or structured as event contracts rather than simple entertainment bets; accessibility also depends on identity checks, because “no-KYC up to $1,500” generally means a user can place only limited-value activity before verification is required, which narrows participation for larger positions but still leaves the market usable at smaller size.
Traders should watch the National Weather Service forecast cycle, local thunderstorm timing, and any cloud or rain changes that could shave the afternoon maximum, because Atlanta summer highs are often capped by convective activity rather than broad regional heat. The key operational dependency is the airport’s published daily high on Wunderground for the settlement date; once the first datapoint for 2 August is posted, later revisions to 1 August are no longer counted under the market rules.[2]
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. Is Kalshi Legal in California has a different geo footprint.
- Do I need to KYC for Is Kalshi Legal in California?
- 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California 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.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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