Highest temperature in Paris on August 20?

Platform comparison

Market context

The highest temperature recorded at Paris-Le Bourget Airport on 20 August 2026 will determine this market's resolution, with settlement based on the Daily Observations table from Weather Underground rather than summary figures. The market currently shows 0% implied probability, suggesting traders expect temperatures to fall outside whatever range this particular market covers—though the specific temperature bands available for trading are not detailed in the provided description.

August temperatures at Paris-Le Bourget typically peak between 24–27°C, with historical records showing occasional excursions to 28–30°C during heat waves. The station's long-term August average high stands near 25°C. Extreme heat events—temperatures exceeding 35°C—remain relatively uncommon in the Paris region, occurring roughly once per decade on any given date, though European heat waves have become more frequent since 2015. The 0% crowd probability suggests either that the market's temperature ranges are set conservatively high, or that traders are pricing in typical summer conditions rather than anomalous heat.

Traders should monitor European weather forecasts from mid-August 2026, particularly tracking whether Atlantic pressure systems or continental heat domes develop over western Europe. The Météo-France outlook and European Centre for Medium-Range Weather Forecasts (ECMWF) model runs will provide the most reliable guidance 10–14 days before the resolution date. Any significant heat wave affecting France in late August would shift probabilities materially; conversely, cooler Atlantic influences would reinforce current market positioning. Real-time temperature observations from Le Bourget itself will become the decisive reference only after 20 August concludes.

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 20? 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

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.

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.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

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.