Highest temperature in Seattle on August 16?

Platform comparison

Market context

On 16 August 2026, the highest temperature recorded at Seattle-Tacoma International Airport will fall into one of several defined ranges. The market resolves using the Daily Observations table from Weather Underground rather than the Day High & Low summary, a distinction that matters when automated station data and human-reviewed summaries diverge. Current crowd pricing reflects near-zero conviction in any single outcome, suggesting genuine uncertainty about late-summer conditions at the airport station.

Seattle's August temperatures historically cluster between 75 and 85 degrees Fahrenheit, with extremes rare but documented. The 0% crowd probability across all ranges indicates either that traders are waiting for seasonal forecasts to narrow, or that the market has not yet attracted sufficient participation to establish baseline expectations. Comparable August markets in the Pacific Northwest typically see resolution in the 78–82 range, though marine influence and occasional heat domes create meaningful variance. The settlement window closing at 12:00 UTC on the resolution date itself means traders cannot adjust positions after early morning observations.

From a regulatory standpoint, this market's accessibility depends on jurisdiction and operator licensing. Under German GlüStV rules, prediction markets on weather events face stricter oversight than financial derivatives, though many operators structure around these requirements. US CFTC reach extends to US-domiciled traders using offshore platforms, though weather prediction markets occupy a grey zone distinct from commodity futures. No-KYC thresholds up to $1,500 typically apply to aggregate account exposure rather than single-market stakes, meaning traders should verify their platform's specific policy before assuming anonymity at any stake level. Traders should confirm their operator's compliance posture before committing capital.

Methodology

This overview of Highest temperature in Seattle on August 16? 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.

What happens during a tax audit?

You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.

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).