Highest temperature in Paris on July 12?

Platform comparison

Market context

Paris is currently experiencing a severe heatwave on 12 July 2026, with temperatures reaching 93°F (34°C) by evening as passing clouds offer minimal relief[3]. This real-time intensity contrasts sharply with the market’s 0% crowd-implied probability for any extreme high, suggesting traders are betting against a record-breaking day despite the active red alert issued by Meteo France for 54 departments[9]. The settlement hinges on the specific reading at Paris-Le Bourget Airport, a station that historically records lower peaks than southern France due to its oceanic climate influences[4].

Historical data frames this probability as potentially misplaced, given that Paris recorded its highest temperature of 42.6°C on 25 July 2019 during a major European heatwave[4]. While the national record of 45.9°C was set in Gallargues-le-Montueux in southern France, July averages in Paris typically range between 25°C and 29°C, rarely exceeding 37°C[1][2]. The current 0% probability ignores the precedent of July 2019, where sustained high pressure pushed temperatures well above the seasonal norm, indicating the market may be underestimating the likelihood of a similar anomaly in 2026.

Traders should monitor Meteo France’s hourly updates and the duration of the red alert, which signals temperatures persisting around the clock[9]. The primary catalyst is the persistence of this heat dome; if the system remains stationary over the capital through midday tomorrow, the Le Bourget station could breach 38°C, invalidating the current zero-probability stance. Recent climate disclosures highlight increasing frequency of such events, making the 2019 benchmark a critical reference point for assessing whether this year’s heatwave will match or exceed previous extremes[5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Paris on July 12? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

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.

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.

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.