Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 39°C | 100% |
| 35°C or below | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C | 0% |
| 45°C or higher | 0% |
Market context
On 14 August 2026, the highest temperature recorded at Paris-Le Bourget Airport will fall within one of several defined ranges. The market currently shows 0% probability for the YES outcome, suggesting traders expect the temperature to remain below the lowest specified threshold or that settlement data will prove unavailable. Resolution depends on the Daily Observations table from Weather Underground rather than summary figures, a distinction that has historically created discrepancies in temperature reporting across meteorological platforms.
Paris experiences peak summer heat in mid-August, with historical records showing daily highs typically between 24–27°C during this period. The city's 30-year average for 14 August sits around 25°C, though extremes have ranged from 18°C to 35°C. The 2003 European heat wave saw Paris reach 40°C in early August, demonstrating the potential for outlier conditions. Current crowd pricing at 0% suggests either exceptionally narrow range definitions in the YES category or trader consensus that August 2026 will track near-normal seasonal patterns.
Traders should monitor European weather forecasting models as August 2026 approaches, particularly outputs from Météo-France and the European Centre for Medium-Range Weather Forecasts. Atmospheric pressure systems, jet stream positioning, and any developing heat domes across continental Europe in late July will signal whether conditions favour above-average temperatures. The settlement window closes at midday on 14 August, leaving only morning observations available for final resolution; early-morning data from Le Bourget will be critical if conditions remain marginal.
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 Paris on August 14? 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.
UK Frequently Asked Questions
- 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.
- 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.
- 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.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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