Highest temperature in Seattle on August 10?

Platform comparison

Market context

The real-world event is the highest temperature recorded at Seattle-Tacoma International Airport on 10 August, resolved from Weather Underground’s Daily Observations table rather than the site’s summary high. For a market framed around one station and one calendar day, the relevant question is whether the airport reaches the specific temperature band before the settlement cutoff, not whether Seattle as a city looks warm on forecast pages.

The current 0% crowd-implied price is best read against Seattle’s August climatology and the city’s sparse record of extreme heat. Seattle’s average high on 10 August is about 77.5°F, while the historical records for that date reach 98°F, with 95°F and 94°F also appearing in the top end of the distribution; the all-time Seattle maximum is 108°F, set during the June 2021 heatwave.[16][17][20] That makes upper temperature bins possible but uncommon, especially when the market is tied to the airport station rather than a broader metro reading.[11][14][16] In accessibility terms, a platform offering no-KYC up to $1,500 generally means a user can enter small positions without identity verification, but higher limits or withdrawals usually trigger checks; for a market like this, that lowers the barrier to taking a view, not the legal or tax obligations attached to any gains.

For catalysts, traders should watch the airport observation feed itself, because the market resolves from station data and can diverge from forecast summaries if a late-afternoon spike or brief convective warming appears in the observations. The practical reference point is the Seattle/Tacoma International Airport history page and related daily observations, alongside updated short-range forecasts that may move only modestly if marine air keeps the boundary layer cool.[14][10][18] On the regulatory side, German GlüStV treatment can matter if access is offered to German residents, since prediction markets may be viewed through gambling rules rather than pure financial-market rules depending on structure and licensing, while the US CFTC’s reach is mainly relevant where a market is deemed a derivatives-style event contract rather than a simple social game; those classifications affect availability, geoblocking, and compliance posture more than the weather outcome itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Seattle on August 10? 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.

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. 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.

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).