Highest temperature in Seattle on July 22?

Platform comparison

Market context

Seattle-Tacoma International Airport’s highest temperature on 22 July 2026 is the relevant settlement point, and the market is effectively pricing a hot summer day: the leading band is 94-95°F at 100%, with all lower outcomes at 0% in the crowd view.[1] That makes the 0% YES probability easier to read as a pricing artefact than a live weather disagreement, because the market description ties resolution to the day’s peak reading at KSEA/Wunderground rather than to any citywide average or one-off downtown observation.[1]

For context, Seattle in late July is usually watched through the same lens traders use for other airport-based weather contracts: the last few degrees matter, but the airport reading is what settles, and short-lived afternoon spikes can move the result even if the morning feels mild. A 0% print often appears when the market has already absorbed the forecast distribution, so the useful comparison is not “will it be warm?” but “will the maximum land in the exact bracket that settles?” In practice, that makes historical airport highs, the timing of the daily peak, and any local marine-layer breakout more relevant than general Seattle conditions.

The main catalysts are the day-ahead and same-day forecasts, any National Weather Service update on heat or cloud cover, and whether the Sea-Tac station actually reaches its peak during the warmest part of the afternoon rather than earlier in the day. Accessibility also matters: on platforms offering *no-KYC up to $1,500*, a small number of users can enter this market with limited identity checks, but that does not change the settlement mechanics.[1] German GlüStV rules can still be relevant for German-facing access, while the US CFTC remains the obvious reference point for regulated derivatives-style oversight, even if this specific market is not itself a listed CFTC contract.[1]

Sources: 1 · 2

Methodology

This overview of Highest temperature in Seattle on July 22? 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.

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.

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.

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 Tax UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.