Highest temperature in Seattle on July 22?

Platform comparison

Market context

Seattle’s highest temperature on 22 July 2026 will be measured at Seattle-Tacoma International Airport, using the airport station reading that falls into the market’s listed Fahrenheit band. The current crowd view is unusually cautious: the leading outcome is still only 45% for 92–93°F, with 90–91°F next at 24%, which leaves the market effectively split across adjacent warm-range bins rather than clustering around a single point estimate.[1]

For calibration, that distribution matters more than the headline “0% YES” print, which usually reflects how the contract is currently bucketed rather than a literal view that the event is impossible. Late-July Seattle temperatures can move quickly with marine influence, and the airport record will be determined by the day’s peak rather than the morning reading, so traders typically focus on the warmest part of the diurnal cycle and any forecasts for inland heat spillover. Current conditions are already mild at around 70°F, which is consistent with a summer setup but not, by itself, predictive of the day’s maximum.[2]

From a market-access perspective, the regulatory frame is straightforward but not frictionless. If a platform is treating this as an event contract available to US users, the CFTC’s reach is relevant because temperature outcomes are plainly weather-linked derivatives territory, while German GlüStV issues matter for users in Germany because even low-stakes prediction markets can trigger gambling-law analysis depending on structure and access. “No-KYC up to $1,500” generally means a user can reach that cumulative deposit, withdrawal, or trading threshold without identity verification, which lowers onboarding friction for small positions in a one-day weather market, but it does not remove jurisdictional or compliance constraints.

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 Legal UK has a different geo footprint.

What happens during a tax audit?

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

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