Where will 2026 rank among the hottest years on record?

Platform comparison

Market context

2026 will be ranked numerically against all historical years in the Global Land-Ocean Temperature Index to determine its position among the hottest years on record, with the market currently pricing a 34% chance it ranks in the top tier. Historical modelling from Berkeley Earth suggests the most probable outcome is a fourth-place ranking, assigning a 51% probability to that specific slot, while noting a 10% chance it could claim the top spot and a 21% chance for second place [2]. This distribution implies the current 34% YES probability is slightly elevated relative to the statistical median for a top-three finish, reflecting market sensitivity to early 2026 anomalies where January and February already ranked as the fifth-warmest months globally [3][9].

Traders should monitor the World Meteorological Organization’s updated forecasts, which indicate an 86% likelihood that at least one year between 2026 and 2030 will surpass 2024 as the warmest year ever recorded [1]. The settlement depends entirely on the final annual index release, with May 2026 already registering as the second-highest monthly temperature in the 177-year record, potentially accelerating the year’s trajectory toward a higher rank [8]. Regulatory accessibility for this market is shaped by the German GlüStV, which imposes strict licensing on betting platforms, and the US CFTC’s reach over derivatives, meaning traders must verify jurisdictional compliance. The ‘no-KYC up to $1,500’ feature allows immediate participation for smaller stakes without identity verification, though larger positions will trigger standard compliance checks under these frameworks.

Sources: 1 · 2 · 3 · 4 · 5

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. Polymarket Tax UK has a different geo footprint.

Do I need to KYC for Polymarket Tax 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.

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.

Can I trade anonymously?

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

What happens during a tax audit?

You're responsible for documenting your trades. Polymarket Tax UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.