Highest temperature in Paris on July 22?

Platform comparison

Market context

Paris-Le Bourget Airport will set the settlement temperature for a one-day, midday weather window, so the key question is whether July heat in northern France is strong enough to push the day’s high into a higher Celsius band. A 0% implied chance on the top outcome usually signals that traders see the event as capped well below extreme-summer levels, often because the window ends before the afternoon peak and because Paris highs can be held down by cloud, breeze, or a cooler airmass.

Historically, Paris highs on 22 July have often sat in the mid-to-high 20s Celsius rather than in the sort of values associated with national heatwave headlines, which is why markets like this tend to cluster around the most common summer range unless a hot spell is already established. The useful comparison is not the city’s all-day maximum, but the airport station’s highest reading before 12:00 UTC, which can undercut the later civilian-forecast peak by several degrees.

The main catalyst is the short-range forecast for Île-de-France and any late-breaking heat advisories, with traders watching whether successive model runs keep warm air over northern France through the morning. Any official heatwave language, plus updated morning temperature forecasts for Paris, will matter more than broader seasonal context. If forecasters trim the expected early-day high, the market should stay anchored near the lower temperature bands; if they upgrade the morning warmth, the implied probability can move quickly even without a large change in the full-day forecast.

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 22? 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.

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.

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.

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.