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Highest temperature in London on July 31?

Live odds for "Highest temperature in London on July 31?" pulled from the Polygon order book, alongside the platform attributes of every venue that runs this contract.

25°C 61% 26°C 38% 27°C 3% 21°C or below 0% Volume: $111K Liquidity: $135K Closes: 31 Jul 2026
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Highest temperature in London on July 31?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Kalshi Fees) Pick
polygram.ink (preferred broker)
 61% 39% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Place a position →
Polymarket (direct)
polymarket.com
 61% 39% 0% Geo-blocked in US/UK/EU USDC, on-chain Place a position →
Kalshi
kalshi.com
 — — Up to 7% per trade US-only, KYC required USD Place a position →
Betfair Exchange
betfair.com
 — — 2-5% commission Full KYC from first trade GBP / EUR Place a position →
Manifold Markets
manifold.markets
 — — Play-money (mana) None — play-money Mana (no cash-out) Place a position →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
25°C61%
26°C38%
27°C3%
21°C or below0%
22°C0%
23°C0%
24°C0%
28°C0%
29°C0%
30°C0%
31°C or higher0%

Market context

Highest temperature in London on July 31? — current market-implied probability: 61%. This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 31 Jul '26. The resolution source for this ma…

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi Fees, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?
Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
Is this market available outside the US?
Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
What's the difference between YES and NO shares?
A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
How fast are USDC deposits?
Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
How reliable are the quoted odds?
The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
Alex ChenAlex ChenPrediction Market AnalystandJordan LeeJordan LeeSports Prediction Reporter

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