Highest temperature in London on July 10?

Platform comparison

Market context

The real-world event is the daily high temperature at London City Airport on 10 July 2026, which will determine the market’s resolution. Current crowd-implied probability for the lowest range (25°C or below) sits at 0%, reflecting a consensus that extreme cold is virtually impossible in mid-summer London. Historical data shows July is the UK’s hottest month, with London City Airport averaging a high of 72°F (22.2°C) and recent heatwaves pushing temperatures well above 30°C; in 2022, London recorded 29.1°C on 16 July during a record-breaking summer [2][6].

Traders should monitor upcoming Met Office forecasts and any sudden shifts in southerly wind patterns, which often drive heat into the city. The market is leaning heavily on the 28–29°C range, with 29°C currently the frontrunner at 39% probability, suggesting expectations of a warm but not extreme day [3]. Key catalysts include the 7-day Met Office forecast released this week, which may clarify whether the current sunny intervals and high humidity (88%) will persist or break [4][5]. No major political debates or campaign-finance disclosures are expected to influence weather outcomes, so the primary driver remains atmospheric conditions.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in London on July 10? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.