Highest temperature in Paris on July 22?

Platform comparison

Market context

Paris is in the middle of its July warmth window, with summer days there usually running from about 15°C to 25°C and often settling into warm, pleasant conditions rather than extreme heat. That makes the market’s current 0% YES pricing look detached from the normal seasonal profile, especially because the settlement point is the day’s highest reading at Paris-Le Bourget Airport, not an average city temperature[2].

For context, temperatures in this range are common enough in Paris that a market like this often turns on whether the afternoon peak clears the next band rather than on a major heatwave. The existing book also points to a fairly concentrated cluster just below and just above the mid-20s, with 26°C the front-runner at 45% and 25°C close behind at 42%, which is more consistent with a modest daily crest than with a one-off extreme[1].

The main catalyst to watch is the day’s actual high at the airport station, with the key dependency being whether late-morning and early-afternoon heating pushes the reading into 26°C or beyond before the settlement window closes. In practical terms, traders will be watching the final weather evolution over the rest of the day rather than any campaign-style catalyst; this market is leaning on observed temperature data from Wunderground, so any shift in cloud cover, wind, or timing of the peak will matter more than expectations earlier in the week[1].

Sources: 1 · 2

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

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.

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.