Where will 2026 rank among the hottest years on record?

Platform comparison

Market context

2026’s final ranking among the hottest years on record depends on whether global temperatures continue the recent upward trajectory or moderate slightly after 2024’s peak. The market’s 34% YES probability implies traders believe 2026 will rank fourth or lower, aligning with Berkeley Earth’s estimate that 2026 is most likely (51%) to be the fourth warmest year since 1850, with only a 10% chance of it being the hottest [2]. Historical context shows the top 10 warmest years all occurred between 2015 and 2025, reinforcing that any year in this cluster will likely rank highly, but 2024 remains the current benchmark for number one [6].

Traders should monitor monthly NOAA and EU Climate Service reports, particularly for anomalies in June–August 2026, as these months often determine annual rankings. The World Meteorological Organisation recently warned that one year between 2026 and 2030 is likely (86% chance) to surpass 2024 as the warmest on record, making 2026 a critical candidate [1]. Early 2026 data already shows January as the fifth-warmest January globally and May as the second-highest May in 177 years, suggesting sustained heat but not yet guaranteeing a top-three finish [3][8].

For accessibility, German GlüStV implications mean platforms offering unregulated betting may face restrictions, while US CFTC reach extends to prediction markets deemed securities or derivatives. The “no-KYC up to $1,500” feature allows traders to access this market without identity verification for smaller positions, enhancing privacy but potentially limiting institutional participation. This structure balances regulatory compliance with user convenience, though it does not constitute legal advice.

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Methodology

This overview of Where will 2026 rank among the hottest years on record? 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.

Can I trade anonymously?

Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California 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.

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.

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.