Highest temperature in Paris on July 2?

Platform comparison

Market context

The underlying event is whether Paris will experience a record-breaking heat spike on 2 July 2026, specifically reaching a temperature range that would trigger a "YES" resolution for the highest temperature at Paris-Le Bourget. Current crowd-implied probability sits at 0% for YES, reflecting deep scepticism that temperatures will exceed the threshold required, despite recent European heatwaves.

Historically, Paris’s July maximum averages 24°C, with the all-time record of 42.6°C set on 25 July 2019. Temperatures above 40°C have occurred only three times in the capital, and recent forecasts for early July 2026 suggest highs of 34–38°C, peaking at 40°C on 2 July only in the southwest and Rhône Valley, not Paris itself. This pattern frames the 0% probability as grounded in long-term climatology rather than anomaly.

Traders should monitor Météo-France’s daily updates for the Paris region, particularly any sudden shifts in North African airflows that could push temperatures toward 40°C. The market leans on the scheduled heatwave declaration from mid-June, which projected 37°C highs in Paris, not the extreme 44.3°C recorded in Landes. A recent Le Monde report confirms the forecast remains stable, with no new catalysts emerging to alter the trajectory. Watch for any unexpected campaign-finance disclosures tied to climate policy that might influence public heat alerts, though none are currently scheduled.

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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 July 2? 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

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

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.

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.

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.

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.