Highest temperature in Paris on July 4?

Platform comparison

Market context

The underlying event is the forecast for peak summer heat at Paris-Le Bourget Airport on 4 July 2026, a date historically prone to scorching highs. Current crowd-implied probability sits at 0% for the highest temperature range, suggesting traders expect conditions far below typical July extremes. Historical data frames this low probability as an outlier; July in Paris routinely sees daily highs between 20°C and 43°C, with an average high of 26°C and a record of 43°C set in 2019 during a severe heatwave[1][2]. Even the lowest monthly July temperature since 1993 was 7°C, indicating that while variability exists, the baseline is warm-to-hot, making a 0% probability for high ranges statistically inconsistent with decades of observed patterns[2].

Traders should monitor the immediate issuance of red heat-wave alerts by Meteo France, as the national meteorological service recently activated such warnings for 54 departments amid a record-breaking heatwave that pushed France to its hottest day ever at 29.8°C for the national thermal indicator[3]. This recent surge in extreme heat, which has already linked to approximately 1,000 additional fatalities across the country, signals a high-risk environment for temperature spikes that could invalidate the current 0% pricing[4]. The settlement window ends 12:00 UTC on 4 July, so real-time Wunderground data for Paris-Le Bourget will be the definitive resolution source, requiring close attention to any sudden atmospheric shifts or cloud cover changes that might moderate the expected peak[2]. The persistence of high temperatures around the clock, as noted in recent alerts, suggests the market may be underpricing the likelihood of a significant heat event on this specific date[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Paris on July 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.