Highest temperature in San Francisco on July 13?

Platform comparison

Market context

San Francisco International Airport will record its peak temperature for 13 July 2026, with the market settling on the specific Fahrenheit range containing that high. The current crowd-implied probability of 6% for a YES outcome suggests traders view an extreme heat spike as unlikely, aligning with the station’s historical norm where July highs typically hover between 65°F and 75°F. While the Bay Area has seen record-breaking heat waves, such as the 87°F spike at SFO in 2013, the 78–79°F range currently commands 50% of the market volume, indicating a consensus that temperatures will remain moderate rather than catastrophic [1][2].

Regulatory accessibility remains a key variable for participation, particularly under Germany’s GlüStV which tightens oversight on digital betting platforms, and the US CFTC’s expanding reach over prediction markets. The platform’s ‘no-KYC up to $1,500’ threshold significantly lowers the barrier for retail traders in this weather market, allowing immediate entry without identity verification for smaller positions. However, traders must monitor upcoming compliance announcements from the CFTC regarding unregistered derivatives, as regulatory shifts could alter liquidity or force stricter verification protocols before the settlement window closes on 2026-07-13T12:00:00Z.

Traders should watch the National Weather Service’s daily forecast updates for the KSFO station, as any sudden shift in the Pacific high-pressure system could trigger an unexpected heat dome. Recent reports indicate the Bay Area is currently experiencing a third-hottest week in over 150 years, though this historical context does not guarantee a similar spike for mid-July [7]. The primary dependency is the Wunderground resolution source, which will publish the official daily maximum for KSFO; any discrepancy between forecast models and the final recorded data will determine the market’s final payout.

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. Is Kalshi Legal in California has a different geo footprint.

Do I need to KYC for Is Kalshi Legal in California?

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. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.

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), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.