Highest temperature in London on August 4?

Platform comparison

Market context

London’s reading is shaped by a fairly standard early-August setup: the latest forecast coverage points to warm, dry conditions rather than an obvious extreme, with London highs around the mid-to-upper 20s Celsius on 4 August and a low-teens overnight floor before the afternoon peak is set. AccuWeather’s monthly view shows an actual high of 72°F for 4 August, which is about 22°C, while other forecasts are running warmer; that gap matters because these markets tend to reprice sharply when the consensus shifts by even 1–2°C.[1][8]

The current crowd leaning towards 28°C is consistent with London’s tendency to get the highest UK temperatures when south-easterly warmth arrives, especially in an urban location like London City Airport where built-up surroundings can hold onto heat. Even so, comparable cases this year show how quickly expectations can swing: Kew Gardens reached 26.6°C earlier in 2026 and was reported as the warmest day of the year so far at that point, which underlines that the market’s 0% yes price is only credible if the day stays ordinary rather than drifting into a late-afternoon spike.[5][15]

For traders, the key catalysts are the final short-range forecasts, any Met Office or BBC update on a hotter plume moving in, and the timing of cloud cover or a sea-breeze off the Thames estuary, which can knock a degree or two off London City’s maximum versus inland sites. The UKHSA’s London heat-health alert page also signals that forecasters are watching the broader heat-risk backdrop, while wider coverage has recently described a fourth UK heatwave and 35°C forecasts elsewhere, so a small northward shift in the air mass is the main thing that could pull this market away from the low-to-mid 20s range.[4][16][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in London on August 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?

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Can I bet on individual matches?

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Which sports markets are available?

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How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.