Highest temperature in San Francisco on June 30?

Platform comparison

Market context

The real-world event hinges on the maximum temperature recorded at San Francisco International Airport on 30 June 2026, with resolution sourced from Wunderground’s daily history for station KSFO. Historical data frames the current 0% crowd-implied probability for the 65°F or below range as statistically sound; June in San Francisco typically sees average highs near 70°F, with the highest daily average high reaching 70°F on 29 June[2]. Recent 15-day records show temperatures peaking at 72.6°F, reinforcing that sub-66°F outcomes are exceptionally rare for this period[3].

Traders should monitor the National Weather Service’s Climatological Report (Daily) for official verification, as Kalshi’s market structure confirms outcome verification relies on this source[1]. No immediate weather catalysts are forecast, but the settlement window closes strictly at 12:00 UTC on 30 June, with data expiration occurring by 04:00 EDT on 1 July if delayed[1]. The regulatory landscape adds complexity: German GlüStV implications may restrict access for EU residents, while US CFTC reach governs contracts offered to Americans, and the ‘no-KYC up to $1,500’ threshold ensures accessibility for smaller traders without identity verification hurdles.

This market’s accessibility is further shaped by its exclusion of persons holding material non-public information or employed by source agencies, a standard safeguard in regulated prediction markets[1]. The 0% probability for the lowest range reflects not just climatic norms but also the rigorous verification process that eliminates outlier data, ensuring traders rely on verified, authoritative records rather than speculative forecasts.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in San Francisco on June 30? 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 KYC UK has a different geo footprint.

Do I need to KYC for Polymarket KYC UK?

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.

What happens during a tax audit?

You're responsible for documenting your trades. Polymarket KYC 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).