Highest temperature in Seattle on August 9?

Platform comparison

Market context

The real-world event here is the **highest observed temperature at Seattle-Tacoma International Airport on 9 August 2026**, with the market resolving off Weather Underground’s **Daily Observations** table rather than the summary high/low line. That makes the settlement reference point operational, not interpretive: traders should care about the station reading and the publication timing of the next day’s first datapoint, because revisions published before that cut-off can still matter under the market rules.[8][13]

The current 0% crowd-implied probability for the YES side looks consistent with Seattle’s August climate profile and its relatively low frequency of very hot days. Seattle’s August record high is 99°F, and the 9 August historical average high is about 77.7°F, with recent forecast products and history pages showing typical highs in the mid-70s rather than the upper 90s.[2][4][11][12] The market also sits against a broader regulatory backdrop: under Germany’s GlüStV, access for German users can be constrained by online gambling rules and licensing treatment, while US CFTC jurisdiction can still matter for exchange-style derivatives structures that touch US persons or US markets.[*] For accessibility, “no-KYC up to $1,500” generally means smaller positions may be entered without full identity verification, but larger activity, withdrawals, or jurisdiction checks can still trigger verification limits.

For catalysts, the key watch items are the daily station observations from Sea-Tac, any late corrections to the meteorological record, and whether a short-lived warm spell or marine layer shifts the afternoon peak above forecast norms. National Weather Service and mainstream forecast products pointed to roughly 76°F on 9 August with mostly sunny conditions and light onshore flow, which is the sort of setup that tends to cap extremes unless an unexpected downslope or regional heat plume develops.[8][12][14] News coverage of recent Pacific Northwest heat events also matters as context, because traders often reprice when synoptic patterns change quickly, even if the settlement outcome ultimately depends on the airport station reading rather than citywide impressions.[17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Seattle on August 9? 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

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FAQ

Is Polymarket legal in my country?

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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. Polymarket Germany Legal 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).

What if regulation changes?

If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Germany Legal would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.