Highest temperature in London on July 12?

Platform comparison

Market context

London City Airport is experiencing sunny intervals with a high of 29°C today, 12 July 2026, while the market for any higher temperature range remains at 0% probability. This current reading sits well below the station’s July average high of 22°C (72°F) and the monthly forecast ceiling of 31°C (87°F), suggesting the day will not breach extreme thresholds [1][2][4]. Historical data shows London’s highest recorded temperature reached 40.2°C at Heathrow in July 2022, yet such extremes are rare and typically associated with prolonged heat domes rather than single-day spikes [7]. Given today’s moderate conditions and the lack of preceding heatwave activity, the 0% crowd-implied probability aligns with the absence of any catalyst pushing temperatures into higher ranges.

Traders should monitor the Met Office’s 7-day forecast updates and Wunderground’s real-time hourly logs for any sudden shifts in wind direction or humidity that could elevate temperatures beyond the current 29°C peak [3][4]. No scheduled political debates, campaign-finance disclosures, or conventions are expected to influence weather patterns, as atmospheric conditions remain independent of the political calendar dominating trump-prediction.bet. The market is leaning on the immediate meteorological dependency: if no heatwave warning is issued by the Met Office before 12:00Z settlement, the resolution will likely fall in the lowest temperature bracket. Recent NW3 Weather reports from 10 July show a maximum of 31.2°C, indicating that even recent peaks remain below extreme levels, reinforcing the low probability of a higher outcome [8].

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.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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.

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.