Highest temperature in San Francisco on July 13?

Platform comparison

Market context

The market hinges on whether San Francisco International Airport records a temperature exceeding 79°F on 13 July 2026, a threshold the crowd currently deems unlikely at 5%. Historical data shows July highs in San Francisco typically hover around 70°F, rarely surpassing 79°F, though extreme heat waves have pushed airport temperatures to 87°F in 2013 [1][2]. The 5% probability aligns with the statistical rarity of such an event, yet the 1972 Bay Area heat wave that produced 116°F in Healdsburg demonstrates that regional anomalies can defy local norms [3].

Traders should monitor the National Weather Service’s heat wave forecasts for the Bay Area and Wunderground’s daily KSFO updates as the settlement window closes [2][9]. A sudden shift in atmospheric conditions, such as a marine layer failure or inland heat dome expansion, could act as the catalyst for a YES resolution. Recent reporting on Bay Area heat waves confirms that record-breaking temperatures often emerge from rapid, unpredictable shifts rather than gradual warming trends [2].

Regulatory accessibility remains a key factor for participation, with German GlüStV implications limiting licensed operators while US CFTC reach creates compliance uncertainty for unregistered platforms. The ‘no-KYC up to $1,500’ feature allows retail traders to access this weather market without identity verification, bypassing traditional financial gatekeepers. This structure enhances liquidity for niche events like temperature forecasts, though it does not alter the underlying regulatory risks tied to jurisdictional enforcement.

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?

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.

Do I need to KYC for Polymarket Legal 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.

Can I trade anonymously?

Pseudonymously, yes — up to the KYC threshold. Polymarket Legal 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.

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.