Highest temperature in Paris on June 28?

Platform comparison

Market context

Paris is experiencing a historic heatwave that has pushed temperatures to unprecedented levels across Île-de-France, with peaks near 40°C recorded earlier in the week before a gradual cooling began on Friday. The crowd-implied probability of 0% for the highest temperature on June 28 suggests traders believe the day will remain too mild to breach the upper thresholds, despite the week’s extreme plateau. Historical context from this June 22–28 period shows a clear pattern: while Monday through Thursday saw extreme heat, the weekend is expected to be milder, with highs around 35°C and a heightened risk of thunderstorms, which could disrupt sustained high temperatures.

Traders should monitor the cooling trend confirmed by Meteo France, which issued a red heatwave alert for 54 departments, indicating that high temperatures will persist around the clock, though gradual relief is expected by the weekend. The key catalyst is the timing of the cooling front, which began on Friday, June 26, and is projected to bring storms and milder conditions by Sunday. Recent reports from Sortiraparis confirm that the heatwave is easing, with Sunday, June 28, wrapping up the week on a milder note, making the market lean on the cooling trend rather than the earlier heat peaks. This aligns with the 0% probability, as the market anticipates the day will not reach the highest temperature ranges seen earlier in the week.

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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 June 28? 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.

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.