Highest temperature in San Francisco on July 13?

Platform comparison

Market context

San Francisco International Airport is expected to record its peak daily temperature for 13 July 2026, with the market betting on whether that figure will exceed a specific threshold. Historical data shows July highs in San Francisco typically hover around 70°F, rarely surpassing 79°F, while extreme heat waves have pushed airport readings to 87°F in recent years[1][2]. The current 6% YES probability implies the crowd expects temperatures to stay within the lower, more common range, aligning with the station’s long-term norms where triple-digit heat is virtually unheard of at the airport despite inland Bay Area records reaching 116°F[3].

Traders should monitor the National Weather Service’s daily forecast updates for the KSFO station and any emerging marine layer disruptions that could elevate temperatures beyond the usual 70°F ceiling[8]. A sudden breakdown in the coastal fog, which normally moderates San Francisco’s summer heat, would be the primary catalyst for a spike, though such events are statistically rare in mid-July[1]. Recent regional heat waves have tested records, but the airport’s specific microclimate has remained resilient, with the highest recorded July temperature at KSFO being 87°F, tied in 2013[2].

From a regulatory standpoint, the market operates under a complex overlay of German GlüStV gambling rules and US CFTC reach, limiting accessibility for certain jurisdictions. The ‘no-KYC up to $1,500’ feature allows traders in permitted regions to access this weather event without immediate identity verification, though GlüStV compliance may still restrict participation for German residents depending on local enforcement[1]. This structure reflects the site’s focus on brand-legal clarity, ensuring that while the event is purely meteorological, the trading mechanism adheres to strict jurisdictional boundaries without offering legal advice.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in San Francisco on July 13? 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?

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Do I need to KYC for Is Kalshi Legit?

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.

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).