Highest temperature in Paris on August 4?

Platform comparison

Market context

Paris is in its warm-season peak, with August highs typically clustering in the mid-20s Celsius and occasional stronger late-summer spikes above that. AccuWeather’s monthly outlook has Paris on 4 August around 26°C, while WeatherSpark says 4 August is usually the warmest point of the year, with typical highs near 78°F, or about 26°C.[1][12]

That matters for this market because a 0% implied yes suggests traders are currently treating the settlement threshold as effectively out of reach, even though the seasonal baseline still allows for a heat-sensitive move if conditions line up. Comparable August averages from several forecast sites sit close to 23–26°C for daytime highs, which points to a fairly ordinary Paris summer pattern rather than an exceptional heat event.[2][13][15]

The main catalyst to watch is the short-range forecast for the Paris area and any updated temperature guidance from local weather coverage, since the market resolves on the highest reading at Paris-Le Bourget Airport rather than a citywide average. Sortiraparis reported a slight improvement on Tuesday 4 August, with sunshine after possible morning showers and thunderstorms and highs around 30–32°C for Paris and Île-de-France, which would matter if that warmth reached the airport site.[11] Traders will also be leaning on the Wunderground daily-history page for the final recorded peak, so late-day warmth, cloud cover, and storm timing are the immediate dependencies.[7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Paris on August 4? 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

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.

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.

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.