Highest temperature in London on July 12?

Platform comparison

Market context

London City Airport is currently experiencing sunny intervals with a high of 29°C on Sunday 12 July 2026, a figure that sits well below the extreme thresholds required to trigger a positive resolution for this weather market[4][5]. The crowd-implied probability of 0% YES reflects the immediate reality that today’s peak temperature has already been recorded and confirmed, making any further rise impossible within the settlement window that closes at 12:00 UTC[4].

Historical data frames this near-zero probability as rational rather than speculative, as London has only once breached 40°C, a record set at Heathrow and St James’s Park in July 2022, not at City Airport[7]. July is typically the hottest month with an average high of 22°C (72°F), and while daily highs in July 2026 are forecast to range between 21°C and 31°C, the specific 29°C peak observed today aligns with standard summer variability rather than record-breaking anomalies[1][2].

Traders should note that the settlement source is fixed to Wunderground’s historical daily record for EGLC, meaning no future announcements, campaign disclosures, or scheduled debates can alter the outcome once the day’s maximum is logged[8]. With the Met Office confirming sunny conditions and zero precipitation probability for today, the market has effectively resolved based on the observed 29°C maximum, leaving no catalysts to watch for a reversal[3][5].

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 12? 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 Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

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.